This is a newly made glass clip to hold 8" by 8" regular window glass you can buy at the hardware store to the bed of a Printrbot +. For some reason the clip this is descended from didn't clip it tightly enough. This is made from scratch but I got the idea from the other glass clip.
Edit: This was designed to work on a Printrbot + V1 with the bed leveling springs addon. I don't know if it'll work with the V2 or without the springs as the size of the clips might interfere with other screws.
Print 4 of these and attach them through the heated bed screw holes. You'll need longer screws than stock, I used 3/4 inch.