Glass plate holder for leveling

I needed a glass plate holder so I can level my glass plate on my CNC machine.
The slot can be customized based on the thickness of the glass.

Under my glass plate I used foam in order to get some pressure on the plate but the softness of adjusting it.
The foam is also very rough so the glass plate will not move during engraving.

[2015-09-23]
New version! I used my glass plate holder and noticed that I was unable to really tighten the glassplate between the holders. Therefor I have a