I have no idea how feasible it is - I just remember Tom mentioning here that the trigger bar could work for a fully tensioned design.
I also don’t know what the market is but Walthers certainly aren’t unpopular, and on a completely selfish note, if they had a “Holstering Safety” I’d never have to talk myself out of buying a Glock again. M&Ps would be worth looking at, and of course anything that reduces the odds of a 320 shooting yet another person is a good thing.
This forum is a small sample size, but around here at least, I think there are a lot of people who would happily carry a striker gun other than Glock if only they could put a device like the SCD on them.
@jlw, are you still running a P-10?
David S.