Customized version of http://www.thingiverse.com/thing:250422

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=250422

Using the following options:

Outer_Side = 50
Frame_Flange = 3
Cutter_Thickness = 0.3
Frame_Thickness = 2
Inner_Side_Difference = 10
Inner_Height_Difference = 3
Outer_Height = 10
Has_Inner_Cutter = no