Wheel Hex Hub - Parametric w/FreeCAD model

I made a clean-room implementation of the original model, as I needed to tweak the model to adjust some of the clearances and it only had STL files available.

FreeCAD model has been attached as well in case anyone needs to tweak further for modified versions.

STEP files for 12mm Hex standard sizes are attached.

Added STEP files and FreeCAD source file for easier tweaking.