bed center calibration tutorial using parametric crosshairs with square —

Founded bed center calibration tutorial using parametric crosshairs with square models & stl files for printing
Prusa i3 Full Bed Test Print
MartinHopkinsDesign
Bed Level Correction Calibration
H.O.M.E. Weingarten
XO Bed Leveling Assist
MakingThingsCLT