bought a P1S used with 7 thousand hours of printing on it from previous owner. and right away was able to see ghosting, Over heating filament, and other minor issues. so I cleaned the machine, Adjusted the belts, created a custom profile in Bambu labs for printing and filament profiles to lower the nozzle temp, and dried my 5 year old filament. and then the print was night and day. Measuring within .02 and .10 of Tolerences. 19.98 on 20mm with no elephant foot. thanks for the quick model