So we finished screwing on the last few bits of trim and then took it down and registered the bugger. Swung through repco on the way home and picked up new leads, plugs and points and thats greatly improved the horrible misfiring POS which lives in the engine bay, it still hunts and surges a bit under load, reasonably convinced its a carby problem. Might give it the $10 rebuild (strip it down, spray everything with carby cleaner, reassemble) to see if that helps. Anyone got a manual to be able to tell me the stock tune procedure for the carb (eg. mixture screw all the way in then out 2.5 turns?).
Didn't make it to the wrecker for the sigma arms yet but it'll happen, there are two RA65s there so if glenno and rorge succeed with that upgrade we might try it too.