Mmkay, I'll just get right to it then. So the good news is it's probably nowhere near as bad as you're thinking, so my early anxiety-inducing plan seems effective.
Anyway that's it, @dedpool1052 came the closest on guessing, and frankly if SH stops selling because of this change to UA then I won't have a problem discontinuing it, but I still plan to keep it around as long as it sells.
- Space Heater - pretty much on a dare I designed a DIY version of the circuit board, so I'm planning to start offering those for the fellow DIY folks of the world. I tried to make it as easy as possible to put together, but it's still not a beginner project, so if you've never touched a soldering iron it probably isn't for you.
- Underground Accelerator - any time I run low on circuit boards, instead of re-ordering the same version I have I look at the design to see if any changes are necessary. Underground Accelerator's time is coming up soon, so I've decided that the production-model UA will finally get the tonestack bypass switch I've teased for a few months. This will effectively let you go between UA and SH at the flip of a switch, and it's only like $1 extra components so the cost will be staying the same. I don't really want to take back existing UAs to swap the boards as it would also require drilling a new hole in the enclosure so I'm planning not to offer it, but with my track record on saying 'no' to people we'll see how it goes.
EDIT: I just remembered NAMM is coming up next week, so let's pretend that was the big NAMM announcement I would make if I was a real company.
So if I have an SS with the UA Clean channel, and a switch can turn that UA clean into an SH... is it possible to have an Underground Space Signal?