Customized version of http://www.thingiverse.com/thing:1680965

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1680965

Using the following options:

size_y = 100
size_x = 100
num_sides = 12
supports = yes
separation = 1
base_height = 2
seed = 54
side_length = 9.75
diameter = 50
base = rectangle
position = circumscribed