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:

no_angle = 6.4
height = 10
build_plate_manual_y = 100
build_plate_manual_x = 100
tip_height = 10
cogs = 30
build_plate_selector = 3
cog_length = .9
res = 100
cog_base_height = 10
cog_tip_width = 3
hole_diameter = 5.1
internal_diameter = 21
cog_base_width = 2