So, I have two PowerBooks, 12" display on both. My intention was to swap all good parts into one. First is 1GHz model and the second is the faster 12" PowerBook with 1.5GHz G4. The 1.5GHz model has topcase with some very weird damages on both sides of touchpad, those cannot be cleaned, they are small holes on the surface. I tried swapping topcase from 1GHz model but the machine would not boot if touchpad was connected so I am assuming that those parts just aren't compatible? 1.5GHz model officially supports two finger scrolling while 1GHz does not so apparently there is maybe small difference in hardware. Or is it something else?