Well, that should prove to be a very impressive speaker indeed. If I was asked to nitpick the Stiff Breeze , it would be that the midrange could be improved slightly and that seems to be exactly what you're doing now. And I don't mean for that to be a knock against the standard SBs, as is, an excellent speaker, a solid build (you'll need a couple of knuckles to rap the SBs) providing great detail, not too bright with solid bass performance. Buyers won't be disappointed with the standard SBs but improving the lower midrange coloration is just the ticket and will make an already impressive speaker more so.
And more people should comment on how wonderfully crafted your custom stands are.
Cheers and take care,
KP