RE: Buying a used copy of G4?
I'm not sure that's correct. I have friend that wanted to learn RC. He was getting ready to buy a plane but I suggested he borrow my G4 first. I told him to take it home and register it, fly on the sim a bit and be sure that this was something that interested him before he spent a bunch of money. He had no problems using it on his computer without me unregistering first.
Paul