Sources are available at https://github.com/Lodran/pocket_extruder- Designed specifically to be used with my differential planetary gearbox - See https://www.youmagine.com/designs/differential-planetary-gearboxSTLs are provided for four variations, for different carriage styles and different drive support bearings.pocket_extruder_narrow_105.stl - 37mm carriage mounting bolt spacing, 105ZZ drive support bearing.pocket_extruder_wide_105.stl - 50mm carriage mounting bolt spacing, 105ZZ drive support bearing.pocket_extruder_narrow_115.stl - 37mm carriage mounting bolt spacing, 115ZZ drive support bearing.pocket_extruder_wide_115.stl - 50mm carriage mounting bolt spacing, 115ZZ drive support bearing.