Thanks everyone, you really kept me going. It is now calibrated (trimpots worked perfectly but a bit finicky) and I have made some initial testing through AUX-1 and the phone jack. Sounds perfect apart from a faint hum (earth related?) on max volume. Feels great to have it up and running again!
they do a an upgrade kit containing 42 capacitors for this particular model, good starting point i reckon. I may just go the whole way and do what you did!