I have had nothing but pain when it comes to the Z-axis limit sensor and auto leveling. When printing on just bare glass it seems to work ok, however prints have a very difficult time sticking. I have decided to try PET tape with glue on top for PLA or ABS Juise for ABS to keep the corners down. The auto level sensor with PET on the bed seems to just freak out. I have had the autoleveler crash the bed many times. Anyone have any tips for how to get the z-axis sensor working reliably?