Upgraded clip for round build plate (200mm)

This design is loosely based on Thinner42's glass clamp.

It fits on an AnyCubic Kossel delta printer with a 200mm diameter print bed. It should work on any printer that uses extruded 2020 aluminum as a frame. These clips hold the glass very securely and don't allow for any movement.

**I have also created a 240mm variant, this is untested, and have been told that it does not actually fit. I'm working on a redesign.**

You will need the following for each clip:
3 x M4x8mm
3 x M4 square