Thank you for your reply, and I am still thinking buying the gen hands for my franken.
Just installed a gen rotor because noob one was quiet loud. Didn’t work at the beginning.
It seems that the gen “screw wholes” are little bit thinner than the noob ones. There is only ONE position, where the screws can be fixed and the rotor is touching the reversing wheel. If it’s too deep, not working, too soft, not working. Not sure for how long this will last, but let’s see ???? otherwise I will replace it by the noob one again. This works easily.