Hi, anyone changed a rear wheel cyl ? I've got one that's slightly damp so it's going to need changing.I've had a look & the only thing I'm concerned about is that where the fluid pipe goes in , instead of the old type small nut that slides up the pipe there is a hexagonal nut about 2" long. Does this undo the same as the old type? I can't really see whether it slides on the brake pipe. I can't see any other way that it can come off apart from this undoing , but it would be helpful if someone's done it before. The wheel cylinder is the later type with the two fluid fittings side by side at the top & the two mounting bolts at the bottom. Cheers.