I made this small tool to help balancing Z axis.
It was too complicated to measure high of Z axis on both sides and find same high for both.
So Now I just Clip this Thing on both Z axis guides and move down Z axis until stepper Motors start ratter and move them up again.
after this, both axis sides have exact same high and no additional measure needed.
Print part 2 times in a row and NOT together during one print to avoid any difference in print or resulting from slight bed bendings or bad calibration. High of helper doesn't matter as long as they are identical. It is made to clip on 8mm guide tubes.