Customized version of http://www.thingiverse.com/thing:308109

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=308109

Using the following options:

boarder_width = 3
number_of_layers = 13
tag_size = 44
boarder_thick = 3
image_file = keychain-customizable-lithopane-mark1-420140712-10314-1cj9blu-0.dat
ring_hole = 4.5
shape = 1
layer_height = 0.1