SBVT is now functional, I'll throw it in the list to get recordings of so I can get it up on the site.
It has a nice punchy clean that I really like and I think is very usable, but with the gain up also gets a very pleasant growl which is more of what I expect based on the SVT demos. The differences between the positions on the mid frequency selector switch are subtle (due in part to my adding extra positions), but definitely audible. Somehow the switches I need for the ultra-lo switch either didn't get ordered or got lost somewhere so I just have a jumper on it for now, but I really dig the sound. Ultra-hi switch isn't dramatic, but there is an audible brightness when it's turned on.
So I'm calling this a win, I'll start getting enclosures together for the May SBVT orders and get the rest of them put together.