I could just move the BuildTek I suppose. That might be easier. Won't help me if I need to use the heated bed though so maybe I should keep messing with the grid values until I get it right instead. Oh it should be positive? I've never changing it to be honest. Do I even need it anymore? Also, you changed things in the Marlin_main.cpp. Should I change them too? What difference did they make to your setup versus just changing the Configuration.h?