3D printer glass build plate holder - 4-piece

I bought a couple of glass build plates for my FlashForge Creator Pro and decided I needed something that would hold the glass plate in place while I was preparing it such as applying Kapton tape or applying a layer of hair spray. I also wanted a place to set a plate to cool after a print while using a second plate to start another print.

This simple device works for both cases, it is mostly universal but can be customized if needed. This is my first object created in OpenSCAD and is really