Thanks for all the comments!
I have several pistols with the slide milled for red dots - old eyes and can't see open sights well anymore. I wasn't sure how I'd like the frame mount on my TSO, but it has quickly become my favorite pistol by far. My centerfire 1911s now sit in the safe unloved. Having a .45 version just seems like it would be an awesome shooter. A 97 with a frame mounted optic, thumb rest, E bushing and a full SAO trigger job may be my Christmas gift to myself this year!
Jeff