add parameter for MountRail Clearance

Author: gluap

customizer/src/obs_case_customizer/app.py

@@ -297,7 +297,8 @@ class CustomVariables(BaseModel):
     MainCase_top_rider: bool = True
     MainCase_back_rider_cable: bool = True
     MainCase_top_rider_cable: bool = True
-    MainCase_gps_antenna_housing_hole_width: float = Field(26, title='diameter in mm', ge=22, le=30)
+    MainCase_gps_antenna_housing_hole_width: float = Field(26, title='square side length in mm', ge=22, le=30)
+    MountRail_clearance: float = Field(0.2, title="clearance for mounting rail in mm", ge=0, le=1)
     m3_screw_diameter_tight: float = Field(3, title='diameter in mm', ge=2.6, le=3.6)
     m3_screw_diameter_loose: float = Field(3.25, title='in mm', ge=2.9, le=3.7)
     m3_insert_hole_diameter: float = Field(4, title='in mm', ge=3.5, le=5.6)