I have a set of Heinie Straight Eight Slant Pro sights on my Glock 22 and love them. I'd like to have a set for my Sig 226, but the picture on Heinie's website shows them not fitting flush because of the slide being rounded. Does anyone have Heinie's on their Sig that could fill me in? I saw that Mr. Ayoob's 220ST has a set in his Sig book and they looked like they fit well. Does anyone know if they were custom installed?