Yet Another Bed Height Calibration Test

I discovered this method while printing several small parts.

Print this cylinder near each of the 4 corners of your printer WITHOUT raft or brim (do one corner at a time). A skirt may be necessary just to get plastic to the tip of the extruder. The goal is for them to stick to the printing area without causing deformation at the base. You should be able to clearly see the hole through the bottom of the piece.

If the piece doesn't stick at that corner, move the bed at that corner up. If the base of the piece is deformed, move the bed at that corner down. Repeat until the print at all 4 corners looks good.