Thanks for the heads up; I went & checked out the site today and it seems that they're out of the ones with the tritium inserts. Too bad...that deal they has WAS sweet!!!
As a follow up, I'm contemplating just buying them direct from Ameriglo's site. (I believe they're the same ones for the Sig 225, 226, 228, 239 models). I was planning on sending my slide/internals some time next week for a Duracoat job; what's the asking price to install sights not purchased directly from you?
EDIT: The question about installation still stands; however, I'm confused a bit. CDNN seems to be out-of-stock for the sights...specifically for the XD. However, they do have stock for the sights for the Sig models listed above. Is there a difference then?