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:

tag_size = 40
layer_height = 0.1
number_of_layers = 12
boarder_width = 3
boarder_thick = 2
ring_hole = 4.5
image_file = keychain-customizable-lithopane-mark1-420150704-13559-ag0nlf-0.dat
shape = 0