We finally seemed to be getting somewhere after 7 days of exchanging emails.
I pointed out I shouldn't need a new reverb pan and tried to summarise the known costs.
Bruce's reply was still on track, fortunately - see part 24.
I was going to send one of my reverb pans with the amp (you may recall I bought a replacement to see if it helped my problem - it didn't) so I wouldn't need a third one from you unless the actual spec of the pan has to be different after the upgrade? The original one in my combo is a type 4FB3B1B.
Tube-wise, I'm curious why the new Sovtek tubes that I bought caused a loud hum on the output after an hour of use, but I'll go for a new set from you anyway. Strangely the tubes that were in the amp when I bought it look to be a mismatched set of different makes. I'd welcome a suggested procedure for checking the bias as my knowledge is sketchy.
That's the first quote I've had for the head-only cabinet, AKA shell. It's got to be black really (and black grille cloth please), so I'm hoping you do still have a black one in stock. Overall I believe I'm looking at $100 (upgrade) + $290 (shell) + $60 (four power tubes). Plus cost of return shipping I guess.