Yesterday I decided to overhaul my headset. I have a threaded headset. So went in and lubed it up a bit, took out the bearings and checked them. Everything worked out well except for when I tried to put the top threaded bearing cup back onto the threading that is a part of the fork.... it was not going on smoothly. The threading is screwed! It seems like a real tight threading and it is only the beginning of it that is messed up. What should I do? Saw it off? Try to re-thread it?