I don't think you can prevent the rotor from spinning by over tightening the screw. Worst case you may damage the screw or the thread receiving it. However, if you really put some force while tightening the screw I suppose it may be possible to damage the auto winding module. Chances are good that you are OK.
My only curiosity is that you lubed an ETA rotor? Typically this is unnecessary as the real deal has what it needs. There should be some noise coming from your rotor esp if 7750 as they are notorious for their sound.
Cheers