Printrbot Simple Glass Clip for Alum Bed

I've been having problems with printing on painters tape (prints were warping at the corners), so I switched to a glass surface sprayed with hair spray. In lieu of using binder clips to hold the glass to the aluminum bed, I made these clips. I'm using a 4" x 6" glass piece from a cheap picture frame, approx 1.25mm thick. If these clips are loose on your bed you can add tape to tighten it up.