Looks good! It might take some of the wind out of the sails of the modders plus it is a bit more flexible without permanent modification. The only thing I could think might make it more versatile is if you could store the settings as patches. To me the tube screamer has never been integral but instead a condiment.
Looks homemade to me, but nicely so. Somebody repotted a Tube Screamer board and footswtich, then added every mod he could thing of and made them switch-selectable. That's my guess. Fun stuff.
I am very tempted ... very, would love to hear John Spina review of it, can you dial his mod to TS9 on this thing ??? I think its great studio piece may be more so than a "live."