FlashForge sells a borosilicate glass bed for the original FlashForge Creator. This is 1/4" thick thermal glass, but it requires a shim on the Z axis to ensure that the nozzle is adequately separated from the bed. This model is that shim. All you do with it is put it on the back wall of the back plate that says Creator on it. If you look at that backplate, you will see a notch, which acts as the Z stop. This part fits on the notch and raises it by 6 mm leaving you enough travel on the levelling screws. Install it by press fitting it on the notch in the back wall of the bed. This is perfectly mated to the notch size and wood thickness so it won't move.Just download the STL file and print. I have also attached the original Sketchup model for those that would like to modify it, This was inspired by Laird's model. I redid it so it be would be a perfect press fit with the right tolerances.