Yeah, package it for retrofit and I'd start using it in my build projects over the OPB-3, actually. The latter can do sweepable mids, but you have to try pretty hard (custom order pots).
I would love to have that Sire pre-amp in at least one of my passive basses. It is the heart of the Sires.

It's weird, no problems with my F or the 55-02 that I sold, no nerve issues with them, not sure whats going on, we'll see. Jim