The woodruff key slot on my pan's trans is blown out, so I got to replace the shaft. Do I need to have a machinist press off the gears or can they be removed with out fucking them up at home? If so, can I install them on the new main shaft with out fucking them up or the new shaft? I have no problem taking the shaft to a machinist to press them off, but I'd like to save a buck if It can be done at home. If you've done it before, let me know you did it.