Thanks for the thread. Curious to know whether the arched MSH / "short" trigger combo is preferable to you now even with iron sights. I have also only used a flat MSH and long trigger combo with 1911's, but really just by default because that's what most all "serious" 1911's come with these days. I've since found I really like the arched back strap of the M9. It points very naturally for me. Not apples to apples but the arched MSH seems as though it would be a closer feel to that.