Customized version of http://www.thingiverse.com/thing:1744692

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1744692

Using the following options:

magnet_hole = 5.5
left_edge = true
front_edge = false
ckit_squares = true
edge = 12.5
paperclip_wire_hole = 0
y = 2
x = 2
system = metric
right_edge = false
filament_wire_hole = 0
back_edge = true