I noticed that the price that’s listed on www.chinaprices.cn for dealsmachine was too low. I guess it’s because they just raised the price. IMO that indicates that they do have stock and plan to be unable to resupply.
Good point on the F6! My mistake, I’ve edited to strike the text.
JonnyC did write a dual switch version of STAR, but it does not receive regular updates. I’m sure it’s quite far behind the other versions on both features and testing. (It also doesn’t have ramping!) The primary differences between dual switch firmwares and regular momentary firmwares is that dual switch versions do not have an “off” level and dual-switch can have memory. Nothing huge really.
As far as actually wiring in the ATtiny13A, yes it’s easy… a Zener is already present, so there’s probably no need to add one. Using a Nanjg-105c or other PCB as a breakout is recommended for simplicity, but whatever.
CK hasn’t been on much, I take it that he’s busy with IRL stuff right now. UFLC isn’t CK’s though, it’s tterev3’s firmware. tterev3 is willing to program PICs as a service, I’m not sure what the best way to get in touch is… maybe PM? tterev3's PIC quickstart guide