I was having trouble with the glass corner clip by Benrah staying attached to the bed that I am using which is the glass bed made by Creality 3D for the ender 3 because it wasn't a very tight fit so I reduced the height slightly and also made it a tad bit wider to cover more surface. I lost very little (if any at all for my purposes) printing surface. This remixed clip fits very tight and works flawlessly for me. Hope you have the same result. I printed out of PETG to be able to withstand very high heat.