Today for grins I plugged into my Bogen Mx60 and played for a bit and man this thing really snorts but then at 60 watts I guess I would expect that. Now I replaced the two (C3 &4)40 MFD caps that are for the 530 VDC supply that the Center tap of the OT goes to. Next to be replaced would be the cap that uses 20 MFD (CI) that is for the 440 DCV feed that goes to the output tubes.Next would be the cap can C2 three cap can (ABC) that would be for the phase inverter area, The output tubes and the AF amp after the master gain. Now I suspect I will just use individual caps instead of replaceing the 3 cap can as I can get them from my tech. Amp sounds really good as is but I know that replaceing at least these electrolytics is probably the right thing to do. There is several other caps that are electrolytics too that are smaller values and less voltage for other circuits I may leave for now. I figure at least get the main filter caps done.