Despite what seems to be some cap changes etc and odd looking wiring, this is without question the best sounding Plexi I’ve owned. It took me until now to pull the chassis because I’ve enjoyed playing it for the past month. It’s incredibly dynamic, touch sensitive and cleans up as well as any amp I own including a completely original 1965 Vibrolux. It’s very lush with overtones and harmonics yet also very woody and crunchy depending upon the pickup and volume of my Les Pauls. I think it must be a bass spec as it’s not particualry bright and similar to my JTM45 in that regard. I definitely don’t need to jumper the channels and have the bass almost off. I bought vintage mustard caps 01/400 to change out the Wimas but right now I’m thinking that I should leave it be. Somehow it just works. The only changes I made was putting some good rca 12ax7 long black plates in the preamp section. Of course any insights from the knowledgeable folks on this board are always appreciated.