Problems with calibrating Z-stage building UMO+

[maurice 1]

I'm building the UMO+. On this page:

https://ultimaker.com/en/resources/20907-installation-z-stage

under the heading 'Calibrating' it says:

 

Grab the base plate on both sides at the back and move it down until it lays flat on the roll of tape.

However, that would mean turning the Z-motor by moving the platform! I don't want to do that because I'm afraid to break something. Is this really the way to do it, or am I missing something?

[neotko 1,417]

For a good visual reference check this other manual (for that step it's the same)

https://ultimaker.com/download/175/Ultimaker_Original_assembly_manual_v1.1.pdf