Zeus bits
hi des
when you get the rear derailleur, suggest you change the spring for a campagnolo one, it works a lot better, also if you have problems with getting bottom gear the outer casing catches on the spring before it reaches the screw stop, just grind a bit away from the outer casing so that it reaches the screw stop.
this is the result of many years being sponsored by Zeus in the 70's, wonderful stuff especially the alloy freewheels, and the 2000 range.