No such luck. The first set of coupling caps are Multicap PPMFX metallized poly (better than Solens, but not great) and the second set are Bennics (even less not great:). The 6SN7's are mostly Sovteks. Holm audio, whom I bought them from, had another pair with upgraded tubes, but they were a bit more expensive and I planned to retube anyway. The other pair may have been yours. These amps definitely are keepers and I've asked a local SET amp builder audiomirror.com about upgrading some of the internal parts.