The end of the slide stop pin is no problem with the CT grips. I put them on my Ultra CDP after I shortened the ambidextrous thumb safety. Now the RH thumb safety can't get knocked off safe. The Crimson carry has a blued slide and no nght sights. I prefer the stainless slide, because it shows less holster wear. The black finish on my alloy frame shows lots of holster wear from practice, but alloy won't rust, and the stainless slide shows no marks. The stainless ultra carry with night sights makes a nice platform for the CT grips, too. Although Kimber supports 4" and 5" models for the 22 conversion kit, it works fine on my 3".
I'm months back ordered on all the Kimbers at dealer net for my students, so if you see one, snap it up. If you have the patience of Job, PM me for quotes.