Why would you want to change it. The 3953 can and I mean by a qualified gunsmith be made very slick and still be dependable. In my opinion the dbl action only is the most dependable way to carry.
This is not to say condition one 1911 style autos aren't safe. but you must be proficient in their operation. Novak's in Parkersburg W Va. Actions by T Sugerland Texas and other gunsmiths have done great jobs with 3rd generation SW actions. As to your original question I don't know, call SW Performance center. If anybody would know they should.