Didn't mean to go so long without an update. The amp is completely finished, and it's a killer amp. The big 15" speaker is paralleled with an 8", and a capacitor on the smaller speaker. I may have to replace that cap, if the amp is to ever be used as a Bass amp. We tried it after Church, a few Sundays back, and it hits that speaker rather hard. However, as a guitar amp, it's really, really nice. Great Tremolo, and strong Reverb. Made an input adapter box out of some parts laying around. But, at least I can connect to the Treble and Bass Accordion inputs. Tremolo only works on the Treble channel of this input. Reverb is driven directly off of the main power amp out (connected to the speaker terminals). So, everything that goes through the amp can have Reverb. Footswitch-able, of course.
I have another later version of this amp that is not at all configured like this one. So, if you ever run across an Excelsior 30-50WR, you will more than likely be looking at my model Sano Supersonic. It's well worth picking up. Meaning, obtaining. This is one heavy beast. I have a nice wide deck, rubber-tired hand truck to move this one.
Jack