There is nothing seriously wrong with it but I'd like to start gigging with it again and I'd like to get some preventative maintenance done. A couple of years ago I replaced V1 and V2 with new JJ 12AX7s, the PI with an EH12AT7 and installed some new EH 6V6GT power tubes and set the bias. Filter caps were changed about 10 years ago. However, I hardly used the amp over the last few years and like I said, I want to start gigging with it again. I was planning on having the filter caps replaced again with some F&T caps and replacing all the original electrolytics as the amp is almost 40 years old. Is there anything else I should have my tech look at while he's in there? There's a bit of background hiss but nothing overly annoying. What I want to do is try to make it as "bulletproof" as possible before I bring it to a gig. Not interested in "blackfacing" it, removing the pull boost or snipping the parasitic caps on the power tubes. I really like how it sounds. The amp is basically stock except for the C-Rex speaker that replaced the original Pyle. I appreciate any suggestions and thank you all in advance. Merry Christmas!