diff --git a/.cruft.json b/.cruft.json
index f5d9b1d..370c775 100644
--- a/.cruft.json
+++ b/.cruft.json
@@ -1,6 +1,6 @@
 {
   "template": "git@github.com:bl-sdk/common_dotfiles.git",
-  "commit": "d03eee713ad436d20033d0598eb88f1529c56ca8",
+  "commit": "3d7189e61172cb95877261df8313ae595fe6c02d",
   "checkout": null,
   "context": {
     "cookiecutter": {
@@ -15,7 +15,8 @@
       "__project_slug": "mods_base",
       "include_cpp": false,
       "include_py": true,
-      "_template": "git@github.com:bl-sdk/common_dotfiles.git"
+      "_template": "git@github.com:bl-sdk/common_dotfiles.git",
+      "_commit": "3d7189e61172cb95877261df8313ae595fe6c02d"
     }
   },
   "directory": null
diff --git a/.gitignore b/.gitignore
index ab0f7a4..dcb3783 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .vs
 .vscode
+.idea
 
 __pycache__
diff --git a/Readme.md b/Readme.md
index cfe5459..6150def 100644
--- a/Readme.md
+++ b/Readme.md
@@ -20,7 +20,15 @@ game specific things:
 # Changelog
 
 ### v1.9
+- Added a new `CoopSupport.HostOnly` value.
+
+- Specifying a custom class when calling `build_mod` now type hints returning an instance of it,
+  instead of just `Mod`.
+
+- `SliderOption`s now throw if initialized with a step larger than their allowed range.
+
 - Added `_(to|from)_json()` methods to all options.
+
 - Changed settings saving and loading to use above methods.
 
 ### v1.8
diff --git a/mod.py b/mod.py
index bacfebe..44a0486 100644
--- a/mod.py
+++ b/mod.py
@@ -21,6 +21,8 @@
 
 
 class Game(Flag):
+    """A flags enum of the supported games."""
+
     BL2 = auto()
     TPS = auto()
     AoDK = auto()
@@ -86,15 +88,25 @@ def get_tree() -> Literal[Game.Willow2, Game.Oak]:
 
 
 class ModType(Enum):
+    """
+    What type of mod this is.
+
+    This does not influence functionality. It's only used for categorization - e.g. influencing
+    ordering in the mod list.
+    """
+
     Standard = auto()
     Library = auto()
 
 
 class CoopSupport(Enum):
+    """Enum for how well a mod supports coop. This is informational only."""
+
     Unknown = auto()
     Incompatible = auto()
     RequiresAllPlayers = auto()
     ClientSide = auto()
+    HostOnly = auto()
 
 
 @dataclass
@@ -112,7 +124,7 @@ class Mod:
         description: A short description of the mod.
         version: A string holding the mod's version. This is purely a display value, the module
                  level attributes should be used for version checking.
-        mod_type: What type of mod this is. This influences ordering in the mod list.
+        mod_type: What type of mod this is. This does not influence functionality.
         supported_games: The games this mod supports. When loaded in an unsupported game, a warning
                          will be displayed and the mod will be blocked from enabling.
         coop_support: How well the mod supports coop, if known. This is purely a display value.
diff --git a/mod_factory.py b/mod_factory.py
index 002aaa7..3442c73 100644
--- a/mod_factory.py
+++ b/mod_factory.py
@@ -20,9 +20,9 @@
 from .settings import SETTINGS_DIR
 
 
-def build_mod(
+def build_mod[T: Mod = Mod](
     *,
-    cls: type[Mod] = Mod,
+    cls: type[T] = Mod,
     deregister_same_settings: bool = True,
     inject_version_from_pyproject: bool = True,
     version_info_parser: Callable[[str], tuple[int, ...]] = (
@@ -43,7 +43,7 @@ def build_mod(
     auto_enable: bool | None = None,
     on_enable: Callable[[], None] | None = None,
     on_disable: Callable[[], None] | None = None,
-) -> Mod:
+) -> T:
     """
     Factory function to create and register a mod.
 
@@ -73,13 +73,16 @@ def build_mod(
 
     ^1: Multiple authors are joined into a single string using commas + spaces.
     ^2: A string of one of the ModType enum value's name. Case sensitive.
+        Note this only influences ordering in the mod menu. Setting 'mod_type = "Library"' is *not*
+        equivalent to specifying cls=Library when calling this function.
     ^3: A list of strings of Game enum values' names. Case sensitive.
     ^4: A string of one of the CoopSupport enum value's name. Case sensitive.
     ^5: GroupedOption and NestedOption instances are deliberately ignored, to avoid possible issues
         gathering their child options twice. They must be explicitly passed via the arg.
 
-    Missing fields are not passed on to the mod constructor - e.g. by never specifying supported
-    games, they won't be passed on and it will use the default, all of them.
+    Any given fields are passed directly to the mod class constructor - and any missing ones are
+    not. This means not specifying a field is equivalent to the class default - for example, usually
+    mod type defaults to Standard, but when using 'cls=Library' it will default to Library.
 
     Extra Args:
         cls: The mod class to construct using. Can be used to select a subclass.
diff --git a/options.py b/options.py
index ce1968d..3e0eba9 100644
--- a/options.py
+++ b/options.py
@@ -195,7 +195,8 @@ class SliderOption(ValueOption[float]):
         value: The option's value.
         min_value: The minimum value.
         max_value: The maximum value.
-        step: How much the value should move each step of the slider.
+        step: How much the value should move each step of the slider. This does not mean your value
+              will always be a multiple of the step, it may be possible to get intermediate values.
         is_integer: If True, the value is treated as an integer.
     Keyword Args:
         display_name: The option name to use for display. Defaults to copying the identifier.
@@ -214,6 +215,14 @@ class SliderOption(ValueOption[float]):
     step: float = 1
     is_integer: bool = True
 
+    def __post_init__(self) -> None:
+        super().__post_init__()
+
+        # This is generally non-sensical, and we expect most menus will have problems with it
+        # While you can easily get around it, block it as a first layer of defence
+        if self.step > (self.max_value - self.min_value):
+            raise ValueError("Can't give slider option a step larger than its allowed range")
+
     def _from_json(self, value: JSON) -> None:
         try:
             self.value = float(value)  # type: ignore
diff --git a/pyproject.toml b/pyproject.toml
index 4ebc61f..48036fb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,16 +10,9 @@ target-version = "py313"
 line-length = 100
 
 [tool.ruff.lint]
-# Last time rules scrutinised: ruff 0.6.9 / 2024-10-08
+# Last time rules scrutinised: ruff 0.11.0 / 2025-03-20
 select = [
-    "F",
-    "W",
-    "E",
-    "C90",
-    "I",
-    "N",
-    "D",
-    "UP",
+    "ERA",
     "YTT",
     "ANN",
     "ASYNC",
@@ -31,34 +24,51 @@ select = [
     "C4",
     "DTZ",
     "T10",
+    "FIX",
     "FA",
+    "INT",
     "ISC",
     "ICN",
     "LOG",
     "G",
     "PIE",
+    "T20",
     "PYI",
     "Q",
     "RSE",
     "RET",
-    "SLOT",
     "SIM",
+    "SLOT",
     "TID",
-    "TCH",
-    "INT",
+    "TD",
+    "TC",
     "ARG",
     "PTH",
-    "TD",
-    "FIX",
-    "ERA",
-    "PGH",
-    "PL",
     "FLY",
+    "I",
+    "C90",
+    "N",
     "PERF",
+    "E",
+    "W",
+    "D",
+    "F",
+    "PGH",
+    "PL",
+    "UP",
     "FURB",
     "RUF",
 ]
 ignore = [
+    "ANN401",
+    "S101",
+    "S603",
+    "S607",
+    "PYI011",
+    "PYI021",
+    "PYI029",
+    "PYI044",
+    "TC006",
     "D100",
     "D101",
     "D104",
@@ -76,16 +86,6 @@ ignore = [
     "D410",
     "D411",
     "D413",
-    "ANN101",
-    "ANN102",
-    "ANN401",
-    "S101",
-    "S603",
-    "S607",
-    "PYI011",
-    "PYI021",
-    "PYI029",
-    "PYI044",
     "PGH003",
     "PLR0904",
     "PLR0911",
@@ -100,4 +100,4 @@ ignore = [
 ]
 
 [tool.ruff.lint.per-file-ignores]
-"*.pyi" = ["D418", "A002", "A003"]
+"*.pyi" = ["A002", "A003", "D418"]