diff --git a/Pack/MKWFaraphel/macros.json b/Pack/MKWFaraphel/macros.json
index 3ec09e6..96c0e6a 100644
--- a/Pack/MKWFaraphel/macros.json
+++ b/Pack/MKWFaraphel/macros.json
@@ -1,17 +1,17 @@
 {
   "GAME_REGION": "str(extracted_game.original_game.wit_path.region)",
 
-  "TRACK_TEXT_SCORE": "get_color(name=['yellow', 'orange', 'dark red', 'azure'][getattr(track, 'warning', 0)]).color_text(f'\\\\x{65296+track.score:x} ') if hasattr(track, 'score') else ''",
-  "TRACK_TEXT_PREFIX": "f'{prefix} ' if (prefix := get_tag_template('prefix', '')) else ''",
-  "TRACK_TEXT_SUFFIX": "f' ({suffix})' if (suffix := get_tag_template('suffix', '')) else ''",
-  "TRACK_TEXT_NAME": "getattr(track, 'name', '')",
-  "TRACK_TEXT_AUTHORS": "'\\\\n'.join(author) if isinstance(author := getattr(track, 'author', '/'), list) else author",
-  "TRACK_TEXT_WARNING_IF_DISABLED": "get_color(name='red').color_text('/') if getattr(track, 'warning', 0) != 0 else ''",
+  "TRACK_TEXT_SCORE": "get_color(name=['yellow', 'orange', 'dark red', 'azure'][track.warning]).color_text(f'\\\\x{65296+track.score:x} ') if track.score else ''",
+  "TRACK_TEXT_PREFIX": "f'{prefix} ' if (prefix := track.get_tag_template('prefix', '')) else ''",
+  "TRACK_TEXT_SUFFIX": "f' ({suffix})' if (suffix := track.get_tag_template('suffix', '')) else ''",
+  "TRACK_TEXT_NAME": "track.name",
+  "TRACK_TEXT_AUTHORS": "'\\\\n'.join(track.author) if isinstance(track.author, list) else track.author",
+  "TRACK_TEXT_WARNING_IF_DISABLED": "get_color(name='red').color_text('/') if track.warning != 0 else ''",
   "TRACK_TEXT_HIGHLIGHT_START": "get_color(name='azure').raw if eval(highlight_if if (highlight_if := mod_config.specific_settings['highlight_if'].value) is not None else 'False', env={'track': track, 'mod_config': mod_config}) is True else ''",
   "TRACK_TEXT_HIGHLIGHT_END": "get_color(name='off').raw",
 
   "SETTINGS_MODE": "mod_config.specific_settings['mode'].value",
   "SETTINGS_BALANCING": "mod_config.specific_settings['balancing'].value",
 
-  "IF_NO_WARNING": "if getattr(track, 'warning', 0) == 0 else ''"
+  "IF_NO_WARNING": "if track.warning == 0 else ''"
 }
\ No newline at end of file
diff --git a/Pack/MKWFaraphel/mod_config.json b/Pack/MKWFaraphel/mod_config.json
index 1a3c779..cfbb835 100644
--- a/Pack/MKWFaraphel/mod_config.json
+++ b/Pack/MKWFaraphel/mod_config.json
@@ -18,7 +18,7 @@
             }
         },
         "replace_random_new": {
-            "default": "'Retro' not in getattr(track, 'tags', []) and getattr(track, 'warning', 0) == 0"
+            "default": "'Retro' not in track.tags and track.warning == 0"
         }
     },
     "specific_settings": {
@@ -39,7 +39,7 @@
                 "fr": "Surligner si"
             },
             "type": "string",
-            "default": "'v' + getattr(track, 'since_version', '') == mod_config.version",
+            "default": "'v' + track.since_version == mod_config.version",
             "preview": "track_selecting"
         },
         "balancing": {
@@ -124,9 +124,18 @@
         "GP"
     ],
 
-    "track_file_template": "{{ getattr(track, 'sha1', '_') }}",
-    "multiplayer_disable_if": "getattr(track, 'warning', 0) >= 1",
+    "track_file_template": "{{ track.sha1 }}",
+    "multiplayer_disable_if": "track.warning >= 1",
 
+    "default_track_attributes": {
+        "since_version": "",
+        "sha1": "_",
+        "name": "",
+        "author": "/",
+        "warning": 0,
+        "score": 0,
+        "tags": []
+    },
     "tracks": [
         {
             "name":"Mario Kart Stadium",
diff --git a/source/gui/preview/track_formatting.py b/source/gui/preview/track_formatting.py
index f147105..a9096c7 100644
--- a/source/gui/preview/track_formatting.py
+++ b/source/gui/preview/track_formatting.py
@@ -52,9 +52,7 @@ class Window(AbstractPreviewWindow):
         # insert all the tracks representation
         for track in self.mod_config.get_all_arenas_tracks(ignore_filter=True):
             try:
-                track_repr = track.repr_format(
-                    self.mod_config, self.entry_template_input.get()
-                )
+                track_repr = track.repr_format(template=self.entry_template_input.get())
 
                 offset: int = 0  # the color tag is removed at every sub, so keep track of the offset
                 tags: list[tuple[int | None, str | None]] = []  # list of all the position of the tags, with the offset
diff --git a/source/gui/preview/track_selecting.py b/source/gui/preview/track_selecting.py
index 9de42c3..db5564e 100644
--- a/source/gui/preview/track_selecting.py
+++ b/source/gui/preview/track_selecting.py
@@ -80,7 +80,7 @@ class Window(AbstractPreviewWindow):
         self.text_track_select.configure(state=tkinter.NORMAL)
         self.text_track_select.delete(1.0, tkinter.END)
 
-        template_func = self.mod_config.safe_eval(self.entry_template_input.get(), args=["track"])
+        template_func = self.mod_config.safe_eval(template=self.entry_template_input.get(), args=["track"])
 
         for track in self.mod_config.get_all_tracks(ignore_filter=True):
             value: bool = template_func(track) is True
diff --git a/source/mkw/ModConfig.py b/source/mkw/ModConfig.py
index d0112c8..205baaf 100644
--- a/source/mkw/ModConfig.py
+++ b/source/mkw/ModConfig.py
@@ -7,12 +7,13 @@ from PIL import Image
 
 from source import threaded
 from source.mkw import Tag
-from source.mkw.Cup import Cup
+from source.mkw.Track.Cup import Cup
 from source.mkw.collection import MKWColor, Slot
 from source.mkw.ModSettings import AbstractModSettings
 from source.mkw.Track import CustomTrack, DefaultTrack, Arena
 from source.progress import Progress
-from source.safe_eval import safe_eval, multiple_safe_eval
+from source.safe_eval.safe_eval import safe_eval
+from source.safe_eval.multiple_safe_eval import multiple_safe_eval
 from source.wt.szs import SZSPath
 from source.translation import translate as _
 
@@ -78,8 +79,9 @@ class ModConfig:
     version: str = "v1.0.0"
     variant: str = "01"
 
-    _tracks: list["Track | TrackGroup"] = field(default_factory=list)
-    _arenas: list["Arena"] = field(default_factory=list)
+    _tracks: list["Track | TrackGroup | dict"] = field(default_factory=list)
+    default_track_attributes: dict[str, any] = field(default_factory=dict)
+    _arenas: list["Arena | dict"] = field(default_factory=list)
     track_file_template: "TemplateMultipleSafeEval" = "{{ getattr(track, 'sha1', '_') }}"
     multiplayer_disable_if: "TemplateSafeEval" = "False"
 
@@ -94,8 +96,8 @@ class ModConfig:
     macros: dict[str, "TemplateSafeEval"] = field(default_factory=dict)
     messages: dict[str, dict[str, "TemplateMultipleSafeEval"]] = field(default_factory=dict)
 
-    global_settings: dict[str, "AbstractModSettings"] = field(default_factory=dict)
-    specific_settings: dict[str, "AbstractModSettings"] = field(default_factory=dict)
+    global_settings: dict[str, "AbstractModSettings | dict"] = field(default_factory=dict)
+    specific_settings: dict[str, "AbstractModSettings | dict"] = field(default_factory=dict)
 
     lpar_template: "TemplateMultipleSafeEval" = "normal.lpar"
 
@@ -103,6 +105,15 @@ class ModConfig:
         self.path = Path(self.path)
         if self.nickname is None: self.nickname = self.name
 
+        self._tracks = [CustomTrack.from_dict(self, track) for track in self._tracks if isinstance(track, dict)]
+        self._arenas = [Arena.from_dict(self, arena) for arena in self._arenas if isinstance(arena, dict)]
+
+        self.global_settings = {name: AbstractModSettings.get(data) for name, data in merge_dict(
+            default_global_settings, self.global_settings, dict_keys=default_global_settings.keys()
+            # Avoid modder to add their own settings to globals one
+        ).items()}
+        self.specific_settings = {name: AbstractModSettings.get(data) for name, data in self.specific_settings.items()}
+
     def __hash__(self) -> int:
         return hash(self.name)
 
@@ -125,21 +136,11 @@ class ModConfig:
         kwargs = config_dict | {
             "path": path,
 
-            "_tracks": [CustomTrack.from_dict(track) for track in config_dict.pop("tracks", [])],
-            "_arenas": [Arena.from_dict(arena) for arena in config_dict.pop("arenas", [])],
+            "_tracks": config_dict.pop("tracks", []),
+            "_arenas": config_dict.pop("arenas", []),
 
             "macros": macros,
             "messages": messages,
-
-            "global_settings": {name: AbstractModSettings.get(data) for name, data in merge_dict(
-                default_global_settings,
-                config_dict.get("global_settings", {}),
-                dict_keys=default_global_settings.keys()  # Avoid modder to add their own settings to globals one
-            ).items()},
-
-            "specific_settings": {name: AbstractModSettings.get(data) for name, data in config_dict.get(
-                "specific_settings", {}
-            ).items()},
         }
 
         return cls(**kwargs)
@@ -233,7 +234,7 @@ class ModConfig:
         # filter_template_func is the function checking if the track should be included. If no parameter is set,
         # then always return True
         filter_template_func: Callable = self.safe_eval(
-            filter_template if filter_template is not None else "True", args=["track"]
+            template=filter_template if filter_template is not None else "True", args=["track"]
         )
 
         # if a sorting function is set, use it. If no function is set, but sorting is not disabled, use settings.
@@ -247,7 +248,7 @@ class ModConfig:
             # wrap the iterator inside a sort function
             iterator = sorted(iterator, key=sorting_template_func)
 
-        # Go though all the tracks and filter them if enabled
+        # Go through all the tracks and filter them if enabled
         for track in iterator:
             yield track
 
@@ -267,13 +268,13 @@ class ModConfig:
 
                 if len(track_buffer) > 4:
                     current_tag_count += 1
-                    yield Cup(tracks=track_buffer, cup_name=f"{current_tag_name}/{current_tag_count}")
+                    yield Cup(mod_config=self, tracks=track_buffer, cup_name=f"{current_tag_name}/{current_tag_count}")
                     track_buffer = []
 
             # if there is still tracks in the buffer, create a cup with them and fill with default>
             if len(track_buffer) > 0:
-                track_buffer.extend([DefaultTrack()] * (4 - len(track_buffer)))
-                yield Cup(tracks=track_buffer, cup_name=f"{current_tag_name}/{current_tag_count + 1}")
+                track_buffer.extend([DefaultTrack(mod_config=self)] * (4 - len(track_buffer)))
+                yield Cup(mod_config=self, tracks=track_buffer, cup_name=f"{current_tag_name}/{current_tag_count + 1}")
 
     def get_unordered_cups(self) -> Generator["Cup", None, None]:
         """
@@ -289,13 +290,13 @@ class ModConfig:
             track_buffer.append(track)
 
             if len(track_buffer) > 4:
-                yield Cup(tracks=track_buffer)
+                yield Cup(mod_config=self, tracks=track_buffer)
                 track_buffer = []
 
         # if there is still tracks in the buffer, create a cup with them and fill with default
         if len(track_buffer) > 0:
-            track_buffer.extend([DefaultTrack()] * (4 - len(track_buffer)))
-            yield Cup(tracks=track_buffer)
+            track_buffer.extend([DefaultTrack(mod_config=self)] * (4 - len(track_buffer)))
+            yield Cup(mod_config=self, tracks=track_buffer)
 
     def get_cups(self) -> Generator["Cup", None, None]:
         """
@@ -328,11 +329,11 @@ class ModConfig:
 
         for cup in self.get_cups():
             # get all the cup ctfile, use "-" for the template since the track's name are not used here
-            ctfile += cup.get_ctfile(mod_config=self, template=template)
+            ctfile += cup.get_ctfile(template=template)
 
         ctfile_override_property = "[SETUP-ARENA]\n"
         for arena in self.get_arenas():
-            arena_definition, arena_override_property = arena.get_ctfile(mod_config=self, template=template)
+            arena_definition, arena_override_property = arena.get_ctfile(template=template)
             ctfile += arena_definition
             ctfile_override_property += arena_override_property
 
@@ -433,7 +434,7 @@ class ModConfig:
 
         for track in self.get_all_arenas_tracks():
             track_file: Path = next(
-                track_directory.rglob(f"{track.repr_format(self, self.track_file_template)}.*")
+                track_directory.rglob(f"{track.repr_format(template=self.track_file_template)}.*")
             )
 
             @threaded
diff --git a/source/mkw/Patch/PatchOperation/BmgTxtEditor/FormatOriginalTrackLayer.py b/source/mkw/Patch/PatchOperation/BmgTxtEditor/FormatOriginalTrackLayer.py
index 46389f1..7806da4 100644
--- a/source/mkw/Patch/PatchOperation/BmgTxtEditor/FormatOriginalTrackLayer.py
+++ b/source/mkw/Patch/PatchOperation/BmgTxtEditor/FormatOriginalTrackLayer.py
@@ -49,11 +49,11 @@ class FormatOriginalTrackLayer(AbstractLayer):
             else: tag = "Wii"
 
             patched_name = CustomTrack(
+                mod_config=patch.mod_config,
                 name=name,
                 tags=[tag]
             ).repr_format(
-                patch.mod_config,
-                self.template
+                template=self.template
             )
 
             return f"  {id}\t= {patched_name}"
diff --git a/source/mkw/Track/AbstractTrack.py b/source/mkw/Track/AbstractTrack.py
index d76b326..230f205 100644
--- a/source/mkw/Track/AbstractTrack.py
+++ b/source/mkw/Track/AbstractTrack.py
@@ -15,13 +15,17 @@ class TrackForbiddenCustomAttribute(Exception):
 
 
 class AbstractTrack(ABC):
+
+    mod_config: "ModConfig"
     music: Slot.Slot
     special: Slot.Slot
     tags: list[Tag]
     weight: int
 
-    def __init__(self, music: Slot.Slot = "T11", special: Slot.Slot = "T11",
+    def __init__(self, mod_config: "ModConfig", music: Slot.Slot = "T11", special: Slot.Slot = "T11",
                  tags: list[Tag] = None, weight: int = 1, **kwargs):
+
+        self.mod_config = mod_config
         self.music = Slot.find(music)
         self.special = Slot.find(special)
         self.tags = tags if tags is not None else []
@@ -30,7 +34,8 @@ class AbstractTrack(ABC):
         # others not mandatory attributes
         for key, value in kwargs.items():
             # if the attribute start with __, this is a magic attribute, and it should not be modified
-            if "__" in key or hasattr(self, key): raise TrackForbiddenCustomAttribute(key)
+            if "__" in key: raise TrackForbiddenCustomAttribute(key)
+            # TODO: check potential security issue with setattr and already implemented method and attribute
             setattr(self, key, value)
 
     def __repr__(self):
@@ -45,34 +50,33 @@ class AbstractTrack(ABC):
             yield self
 
     @abstractmethod
-    def repr_format(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval") -> str:
+    def repr_format(self, template: "TemplateMultipleSafeEval") -> str:
         """
         return the representation of the track from the format
         :param template: template for the way the text will be represented
-        :param mod_config: configuration of the mod
         :return: formatted representation of the track
         """
         ...
 
+    @property
     @abstractmethod
-    def get_filename(self, mod_config: "ModConfig") -> str:
+    def filename(self) -> str:
         """
         Return the filename of the track
-        :param mod_config: the mod_config object
         :return: the filename of the track
         """
         ...
 
+    @property
     @abstractmethod
-    def is_new(self, mod_config: "ModConfig") -> bool:
+    def is_new(self) -> bool:
         """
         Return if the track should be considered as new for random selection
-        :param mod_config: mod configuration
         :return: is the track new
         """
         ...
 
-    def get_ctfile(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval", hidden: bool = False) -> str:
+    def get_ctfile(self, template: "TemplateMultipleSafeEval", hidden: bool = False) -> str:
         """
         return the ctfile of the track
         :hidden: if the track is in a group
@@ -80,11 +84,11 @@ class AbstractTrack(ABC):
         :return: ctfile
         """
         category: str = "H" if hidden else "T"
-        name: str = self.repr_format(mod_config=mod_config, template=template)
-        filename: str = self.get_filename(mod_config=mod_config)
+        name: str = self.repr_format(template=template)
+        filename: str = self.filename
         flags: int = (
             (0x04 if hidden else 0) |
-            (0x01 if self.is_new(mod_config) else 0)
+            (0x01 if self.is_new else 0)
         )
 
         return (
diff --git a/source/mkw/Track/Arena.py b/source/mkw/Track/Arena.py
index 6100321..4e83daf 100644
--- a/source/mkw/Track/Arena.py
+++ b/source/mkw/Track/Arena.py
@@ -16,13 +16,20 @@ class ArenaForbiddenCustomAttribute(Exception):
 
 
 class Arena(RealArenaTrack):
+    """
+    Represent an arena object
+    """
+
+    mod_config: "ModConfig"
     slot: Slot.Slot
     music: Slot.Slot
     special: Slot.Slot
     tags: list[Tag]
 
-    def __init__(self, slot: Slot.Slot, music: Slot.Slot = None, special: Slot.Slot = None,
+    def __init__(self, mod_config: "ModConfig", slot: Slot.Slot, music: Slot.Slot = None, special: Slot.Slot = None,
                  tags: list[Tag] = None, **kwargs):
+
+        self.mod_config = mod_config
         self.slot = Slot.find(slot)
         self.music = Slot.find(music if music is not None else slot)
         self.special = Slot.find(special if special is not None else slot)
@@ -31,26 +38,25 @@ class Arena(RealArenaTrack):
         # others not mandatory attributes
         for key, value in kwargs.items():
             # if the attribute start with __, this is a magic attribute, and it should not be modified
-            if "__" in key or hasattr(self, key): raise ArenaForbiddenCustomAttribute(key)
+            if "__" in key: raise ArenaForbiddenCustomAttribute(key)
             setattr(self, key, value)
 
     def __repr__(self):
         return f"<{self.__class__.__name__} name={getattr(self, 'name', '/')} tags={getattr(self, 'tags', '/')}>"
 
     @classmethod
-    def from_dict(cls, arena_dict: dict[str, any]) -> "Arena":
-        return cls(**arena_dict)
+    def from_dict(cls, mod_config: "ModConfig", arena_dict: dict[str, any]) -> "Arena":
+        return cls(mod_config, **arena_dict)
 
-    def get_ctfile(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval") -> (str, str):
+    def get_ctfile(self, template: "TemplateMultipleSafeEval") -> (str, str):
         """
         Return the ctfile for the arena and the redefinition of the slot property
-        :param mod_config: the mod_config object
         :param template: the template of the track name
         :return: the ctfile for the arena and the redefinition of the slot property
         """
 
-        name: str = self.repr_format(mod_config=mod_config, template=template)
-        filename: str = self.get_filename(mod_config=mod_config)
+        name: str = self.repr_format(template=template)
+        filename: str = self.filename
 
         return (
             (
diff --git a/source/mkw/Cup.py b/source/mkw/Track/Cup.py
similarity index 76%
rename from source/mkw/Cup.py
rename to source/mkw/Track/Cup.py
index 48bd608..4e5c0a4 100644
--- a/source/mkw/Cup.py
+++ b/source/mkw/Track/Cup.py
@@ -12,10 +12,12 @@ class Cup:
     class that represent a mario kart wii track cup
     """
 
-    __slots__ = ["_tracks", "cup_name", "cup_id"]
+    __slots__ = ["_tracks", "cup_name", "cup_id", "mod_config"]
     _last_cup_id = 0
+    mod_config: "ModConfig"
 
-    def __init__(self, tracks: list["Track | TrackGroup"], cup_name: str | None = None):
+    def __init__(self, mod_config: "ModConfig", tracks: list["Track | TrackGroup"], cup_name: str | None = None):
+        self.mod_config = mod_config
         self._tracks = tracks[:4]
 
         self.cup_id = self.__class__._last_cup_id
@@ -25,7 +27,7 @@ class Cup:
     def __repr__(self):
         return f"<Cup name={self.cup_name} id={self.cup_id} tracks={self._tracks}>"
 
-    def get_default_cticon(self, mod_config: "ModConfig") -> Image.Image:
+    def get_default_cticon(self) -> Image.Image:
         """
         Get the default cticon for this cup
         :return: the default cticon
@@ -33,7 +35,7 @@ class Cup:
         from source.mkw.ModConfig import CT_ICON_SIZE
 
         ct_icon = Image.new("RGBA", (CT_ICON_SIZE, CT_ICON_SIZE))
-        default_font_path = str(mod_config.get_default_font().resolve())
+        default_font_path = str(self.mod_config.get_default_font().resolve())
         draw = ImageDraw.Draw(ct_icon)
 
         draw.text(
@@ -63,15 +65,15 @@ class Cup:
         path = mod_config.get_mod_directory() / f"_CUPS/{self.cup_name}.png"
         if path.exists(): return Image.open(path)
         # if the icon doesn't exist, use the default automatically generated one
-        return self.get_default_cticon(mod_config=mod_config)
+        return self.get_default_cticon()
 
-    def get_ctfile(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval") -> str:
+    def get_ctfile(self, template: "TemplateMultipleSafeEval") -> str:
         """
         Get the ctfile for this cup
         :return: the ctfile
         """
         ctfile = f'C "{self.cup_name}"\n'
-        for track in self._tracks: ctfile += track.get_ctfile(mod_config, template)
+        for track in self._tracks: ctfile += track.get_ctfile(template=template)
         ctfile += "\n"
 
         return ctfile
diff --git a/source/mkw/Track/CustomTrack.py b/source/mkw/Track/CustomTrack.py
index b655e90..e4f1fa8 100644
--- a/source/mkw/Track/CustomTrack.py
+++ b/source/mkw/Track/CustomTrack.py
@@ -15,19 +15,21 @@ class CustomTrack(RealArenaTrack, AbstractTrack):
         return f"<{self.__class__.__name__} name={getattr(self, 'name', '/')} tags={getattr(self, 'tags', '/')}>"
 
     @classmethod
-    def from_dict(cls, track_dict: dict) -> "Track | TrackGroup":
+    def from_dict(cls, mod_config: "ModConfig", track_dict: dict) -> "Track | TrackGroup":
         """
         create a track from a dict, or create a track group is it is a group
+        :param mod_config: the mod configuration
         :param track_dict: dict containing the track information
         :return: Track
         """
         if "group" in track_dict:
             from source.mkw.Track.TrackGroup import TrackGroup
-            return TrackGroup.from_dict(track_dict)
-        return cls(**track_dict)
+            return TrackGroup.from_dict(mod_config, track_dict)
+        return cls(mod_config, **track_dict)
 
-    def is_new(self, mod_config: "ModConfig") -> bool:
-        return mod_config.safe_eval(
-            mod_config.global_settings["replace_random_new"].value,
+    @property
+    def is_new(self) -> bool:
+        return self.mod_config.safe_eval(
+            self.mod_config.global_settings["replace_random_new"].value,
             args=["track"]
         )(track=self) is True
diff --git a/source/mkw/Track/DefaultTrack.py b/source/mkw/Track/DefaultTrack.py
index 52f6889..b46231d 100644
--- a/source/mkw/Track/DefaultTrack.py
+++ b/source/mkw/Track/DefaultTrack.py
@@ -7,11 +7,13 @@ if TYPE_CHECKING:
 
 
 class DefaultTrack(AbstractTrack):
-    def repr_format(self, mod_config: "ModConfig", template: str) -> str:
+    def repr_format(self, template: str) -> str:
         return " "  # the name is always a blank space. Using nothing result in the filename being used instead
 
-    def get_filename(self, mod_config: "ModConfig") -> str:
+    @property
+    def filename(self) -> str:
         return "beginner_course"  # by default, use the T11 track, beginner_course
 
-    def is_new(self, mod_config: "ModConfig") -> bool:
+    @property
+    def is_new(self) -> bool:
         return False  # default track are never selected for random cup
diff --git a/source/mkw/Track/RealArenaTrack.py b/source/mkw/Track/RealArenaTrack.py
index 495a735..069e977 100644
--- a/source/mkw/Track/RealArenaTrack.py
+++ b/source/mkw/Track/RealArenaTrack.py
@@ -12,32 +12,29 @@ class RealArenaTrack:
     (For example, DefaultTrack is not considered a real track class)
     """
 
+    mod_config: "ModConfig"
     tags: list["Tag"]
 
-    def get_tag_template(self, mod_config: "ModConfig", template_name: str, default: any = None) -> any:
+    def get_tag_template(self, template_name: str, default: any = None) -> any:
         """
         Return the tag template found in templates. If not found, return default
-        :param mod_config: mod configuration
         :param template_name: name of the template of the tags
         :param default: default value if no tag template is found
         :return: formatted representation of the tag
         """
-        for tag in filter(lambda tag: tag in mod_config.tags_templates[template_name], self.tags):
-            return mod_config.multiple_safe_eval(
-                mod_config.tags_templates[template_name][tag],
+        for tag in filter(lambda tag: tag in self.mod_config.tags_templates[template_name], self.tags):
+            return self.mod_config.multiple_safe_eval(
+                template=self.mod_config.tags_templates[template_name][tag],
                 args=["tag"],
             )(tag=tag)
         return default
 
-    def repr_format(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval") -> str:
-        return mod_config.multiple_safe_eval(
-            template,
-            args=["track", "get_tag_template"]
-        )(
-            track=self,
-            get_tag_template=lambda *args, **kwargs: self.get_tag_template(mod_config, *args, **kwargs)
-            # get_tag_template can't be in env because it is dependent of the track self
-        )
+    def repr_format(self, template: "TemplateMultipleSafeEval") -> str:
+        return self.mod_config.multiple_safe_eval(template=template, args=["track"])(track=self)
 
-    def get_filename(self, mod_config: "ModConfig") -> str:
-        return self.repr_format(mod_config=mod_config, template=mod_config.track_file_template)
+    @property
+    def filename(self) -> str:
+        return self.repr_format(template=self.mod_config.track_file_template)
+
+    def __getattr__(self, item):
+        return self.mod_config.default_track_attributes.get(item, None)
diff --git a/source/mkw/Track/TrackGroup.py b/source/mkw/Track/TrackGroup.py
index 1afe300..48f4f67 100644
--- a/source/mkw/Track/TrackGroup.py
+++ b/source/mkw/Track/TrackGroup.py
@@ -1,6 +1,7 @@
 from typing import Generator, TYPE_CHECKING
 
 from source.mkw import Tag
+from source.translation import translate as _
 
 if TYPE_CHECKING:
     from source import TemplateMultipleSafeEval
@@ -8,11 +9,29 @@ if TYPE_CHECKING:
     from source.mkw.ModConfig import ModConfig
 
 
+class TrackGroupForbiddenCustomAttribute(Exception):
+    def __init__(self, attribute_name: str):
+        super().__init__(_("FORBIDDEN_TRACKGROUP_ATTRIBUTE", " : ", repr(attribute_name)))
+
+
 class TrackGroup:
-    def __init__(self, tracks: list["CustomTrack"] = None, tags: list[Tag] = None):
+
+    mod_config: "ModConfig"
+    tracks: list["CustomTrack"]
+    tags: list["Tag"]
+
+    def __init__(self, mod_config: "ModConfig", tracks: list["CustomTrack"] = None,
+                 tags: list["Tag"] = None, **kwargs):
+        self.mod_config = mod_config
         self.tracks = tracks if tracks is not None else []
         self.tags = tags if tags is not None else []
 
+        # others not mandatory attributes
+        for key, value in kwargs.items():
+            # if the attribute start with __, this is a magic attribute, and it should not be modified
+            if "__" in key: raise TrackGroupForbiddenCustomAttribute(key)
+            setattr(self, key, value)
+
     def get_tracks(self) -> Generator["CustomTrack", None, None]:
         """
         Get all the track elements
@@ -22,27 +41,28 @@ class TrackGroup:
             yield from track.get_tracks()
 
     @classmethod
-    def from_dict(cls, group_dict: dict) -> "TrackGroup | Track":
+    def from_dict(cls, mod_config: "ModConfig", group_dict: dict) -> "TrackGroup | Track":
         """
         create a track group from a dict, or create a track from the dict if not a group
+        :param mod_config: the mod configuration
         :param group_dict: dict containing the track information
         :return: TrackGroup or Track
         """
         from source.mkw.Track.CustomTrack import CustomTrack
 
-        if "group" not in group_dict: return CustomTrack.from_dict(group_dict)
+        if "group" not in group_dict: return CustomTrack.from_dict(mod_config, group_dict)
         return cls(
-            tracks=[CustomTrack.from_dict(track) for track in group_dict["group"]],
-            tags=group_dict.get("tags"),
+            tracks=[CustomTrack.from_dict(mod_config, track) for track in group_dict["group"]],
+            **group_dict,
         )
 
-    def get_ctfile(self, mod_config: "ModConfig", template: "TemplateMultipleSafeEval") -> str:
+    def get_ctfile(self, template: "TemplateMultipleSafeEval") -> str:
         """
         return the ctfile of the track group
         :return: ctfile
         """
         ctfile = f'T T11; T11; 0x02; "-"; "info"; "-"\n'
         for track in self.get_tracks():
-            ctfile += track.get_ctfile(template=template, mod_config=mod_config, hidden=True)
+            ctfile += track.get_ctfile(template=template, hidden=True)
 
         return ctfile