I had SF GPs a few years back, one of the caps began to leak and I changed the lot. I'd expect given their age a good tech might be able to give yours a good spring clean.
That said I sold mine not long after and was very happy with Totem Forests while I had them. I've heard Cremona M's a fair bit, they can be made to sound wonderful in the right system, based on that I expect Liuto would also be a good shout.
That said I sold mine not long after and was very happy with Totem Forests while I had them. I've heard Cremona M's a fair bit, they can be made to sound wonderful in the right system, based on that I expect Liuto would also be a good shout.