PLEASE post pics when you do!I've used a 43 with a RMS Shield sight milled into the slide. I'm not super impressed with that optic (being more accustomed to the quality of the RMR and Deltapoint), but that little 43 with a red dot is a good combo. Even the RMS Shield is a bit wider than the 43 slide though, and IMO the RMR on that gun just seems like a sombrero on a little kid.
I do intend to turn my 43 into a mini-RS when I decide on an appropriate dot. It'll have minimal barrel extension with threads as short as possible to keep the brake compact, and will be used with some sort of tuckable holster.