Customized version of http://www.thingiverse.com/thing:352873

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=352873

Using the following options:

comb_z = 0.5
comb_y = 12
comb_x = 79.3
rear_tooth_height = 0
tooth_count = 8
raised_z = 0
raised_y = 9.3
raised_x = 68.8
tooth_length = 12.2
front_tooth_height = 1.2
tooth_gap = 2
tooth_margin = 8.25