Rear Mount for Glas or PC on heatingbed printrbot

Two mounts, left right for the original printrbot to hold a 2 mm glas or Polycarbonat.
I print on Polycarbonat. When the part is cold, I can take the PC with the part from the bed. Easily you can take the part from the PC.

The front: http://www.thingiverse.com/thing:53682