if you are going to use the superplate glass to replace the black mylar sticker, one tip need your attention please, in case of the nozzle touch and scrach the platform:
Because the superplate glass is 3mm thicker than mylar sticker, After you replace the glass with existing mylar sticker,pls remember to up the limit switch on Z axis for about 3mm, then do leveling before you start printing and you can also slightly adjust the knob under platform.