[UM3 print cores different height]

So I figured out the lever was not calibrated and the printcore didn't move up. After watching a youtube video on how to actually do the "calibrate lift switch" calibration, everything turned out fine and the printer is back to normal. Thanks anyway.

[UM3 print cores different height]

If I print something with 2 print cores (main and support structure) the lower print core then destroys whatever the higher print core prints. Even though you can move the second print core up and down manually by using the lever, I don't think that should be necessary during printing, right?

Is there anything I have to consider before printing a project using both print cores?