Calibration Sigma/x

Another test print for bed leveling.
It seems that the 'glass bed suspended by the studs' seem to deform of buckle after use - especially with higher bed temperatures.

One.stl & Two.stl for dual color print.
Single.stl for duplication or mirror test.

My bed was around 1.5mm lower at the back-left corner.
Checked rails on x/y - not a rail problem.

Installed a new glass bed - perfect print :|