Customized version of http://www.thingiverse.com/thing:1472259
Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing\_id=1472259
Using the following options:
nema_hole_size = 3.5
nema_width = 42.3
nema_hole_spacing = 31
thickness = 2
nema_boss_size = 27
The author marked this model as their own original creation. Imported from Thingiverse.