Ok gents, I'm currently part of the way through renovating my old Tornado. So far it's had the cosmetics done and looking good, and also a new spring kit (a single spring and guide) fitted. With it's favoured Superdomes it's putting out 8.5ftlbs or so, about 1 ft/lb up on it's pre-renovation state.

In addition to the new spring I also bought a new leather washer and rivet etc. for the piston (although the old one is still fairly ok) but wanted to confirm the process for fitting that. I take it I need to drill out the old rivet, but what should I be using to fit the new one?

Other than that I'm just planning to clean and re-lube the internals, as I'm already happy enough with it's power output and accuracy.