Yes, I've got no intention of doing a showroom restoration! Just hoping to make a couple of switches to undo some of the changes that have been done to it over the years (it's a real frankenstein at the moment — Suntour rear derailer, but with an old Shimano clamp, Campagnolo front derailer...to name just a couple of things). Some of the bits need replacing anyhow, so that little breakdown you've given me above will be very helpful as a starting point to look at, thanks!