Panel/Corner Bracket

I wanted a version that was easier to print and didn't include a slot for the third side. These will be used on a Lack enclosure for my Anet A8, and I'll be using foam core sheets with foam panels glued on for sound protection.

EDIT March 29, 2018

- added file for pins to hold the foam core panels. I would reduce the size to 95% to make sure they will fit easily into the holes.