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:

res = 59
build_plate_manual_y = 100
build_plate_manual_x = 142
no_angle = 10
height = 0
cogs = 8
build_plate_selector = 3
internal_diameter = 10
cog_length = 30
hole_diameter = 10
cog_base_height = 20
tip_height = 20
cog_tip_width = 5
cog_base_width = 20