just to add, Matt Humphris (trade section at the bottom of the forum) does proper long bolts for the micra, some are long and some are extra long.
something like £2 a bolt? but double check with him. well worth it, and i will be getting some from him at some point.
also i know that you can remove the studs from the front without taking the hub off, not sure on the back because i haven't tried.
