Customized version of http://www.thingiverse.com/thing:54395

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=54395

Using the following options:

cog_tip_width = 3
res = 50
cog_base_height = 30
cog_base_width = 3
cog_length = 8
no_angle = 10
build_plate_selector = 0
tip_height = 20
build_plate_manual_y = 100
build_plate_manual_x = 100
cogs = 18
hole_diameter = 3.2
internal_diameter = 16
height = 30