Bed replacement material CR-10 Mini

I have been using the glass bed that comes with the CR-10 Mini and I have discovered that it has a concave dish area in the middle of it. I have ordered some Buildtak but I was wondering the best method to replace and reset the bed height? Should I remove the glass since it’s not completely flat? Should I just place it over the glass?
What’s the best method to reset the Z Axis limit? Do I move it or try to move the bed with the spring adjusters? If I move the Z Axis limit switch, how do I set it?
Once the bed material has been replaced, what new calibration steps should I do aside from bed-leveling?

Any help or insight is greatly appreciated.


Issues like this are why I just installed a BLTouch ABL. So far, it is performing quite well.