[Mike Phelan]

Nice job, Christopher. I've done this lots of times.

Also worth straightening the spring out apart from the last inner turn, by holding the outer end in a vice; at the same time you can clean it properly with wire wool and lubricate it properly with thick oil or grease, depending on its size.

There's a knack on removing and refitting a spring in the barrel - takes a few minutes but pages to try to explain!