This is a remix of Makersome's corner bracket for Flashforge Dreamer/Creator Pro glass bed upgrade http://www.thingiverse.com/thing:715545
I have removed the lip that clamps the glass down and instead added a slit and a knobbly bit on each corner to provide pressure on the bed but still making it easily removable without having to undo the wing nuts. Tested and works great.
The print pictured was just a test print at 20% 0.2mm, 3 top layers, 3 bottom layers and 3 outer shells. I have since printed a set of 4 in ProtoPasta HTPLA matte black fiber at 100%, 0.2mm and baked them in the oven at 110 degrees C for 60 mins.
No support required