It's not so easy to adjust the Z-Axis-positions at your hypercube evolution, especially, when you fight the frontier for your own.
Therefore, I made a little gauge, which helps to do this.
It's for a 300 x 300 mm bed, with the 2020-Profile-dimensions of 40 5 x225 mm. Stepper-Leadscrew 8 mm, Z-Axis-rails 12 mm.
If you like to use it on other dimensions, please adjust the original FreeCAD-File which is enclosed.

Just print this gauge twice and screw them together with two M3x10 screws.
Have fun.