Cheers Nick,
C19/119 have been replaced also on your recommendation, they looked vey ropey!
My 2 months spent wiring a recording studio into a gothic castle in Wales in 1996 has finally paid dividends. All that lead solder smoke didn't render me completely useless! It's not as neat as that wiring job was because I started that from scratch, but i's just as functional.
I've learnt a lot and will now be for ever on the look out for another old amp to resurrect.