This is a perfect and simple solution for those who want to add borosilicate glass to their Anet A6 print bed. This creation isn't adjustable but it meets the basic requirement quite simplistically. Make sure it is firmly seated toward the Z carriage and not the frame. In my case, I had to print it again because I had it seated against the frame and it got mangled/destroyed when it collided with one of frame's screws as the printer was homing all axes. My second print suffered slight but negligible warping.