Customized version of https://www.thingiverse.com/thing:1707835

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=1707835

Using the following options:

seed = 550005
base = rectangle
base_height = 2
num_sides = 8
side_length = 50
position = inscribed
separation = 1
supports = yes
size_x = 80
size_y = 80
diameter = 80