For the first time I took the chassis out of the combo case and really had a good look at it.
What I saw convinced me that only an expert assessment was going to unravel the mysteries therein. Rarely can a valve amp have had as tightly-packed circuitry - point-to-point this wasn't.
So I concluded with a direct request to ship it back to them. Bruce's reply was partly in agreement - see part 17.
I certainly have got an intermittent reverb :( What I don't have is a serial number. I just took the chassis out of the case and although there's a Smoky Amps sticker right inside the chassis approximately in line with the bass knob, there is nothing written on it apart from the standard logo and no other visible stickers at either end of the chassis, inside or out.
So how about getting the amp to you to sort out the various issues, please?