MMM i was thinking of jamming the back wheel and or chain and putting it in 5th gear but i thought that kinda preasure would break the box or something else, can i put that kind of force on it? am i being silliy cause right now i dont wana break anything....Is an impact gun similar to that used by the guys to change F1 wheels? iv only got a standad (but good) socket set a long bar 18" to put weight through but just wana make sure that if i jump (so to speak ) it wont damage it, im not to worried about the NUt as i can get a new one, or use the one from the spare box i have! ADVISE PLEASE thanks