I did this to my S2. You don’t have to switch to sao, but I really like the tac sports trigger. I also changed to the concealed checkmate hammer. It has much shorter hammer hooks so the single action is even better, but in all honesty I only really notice the difference in trigger pull in bullseye shooting. If you have done all the smoothing and springs already, the single action is nice enough with the stock parts that for uspsa the difference is splitting hairs. If you do a magwell, you’ll need the short grips or trim the ones you have. The Henning baseplate works fine with the magwell I got from armory craft. I did get a second trigger bar and hammer strut and set it up so I could just swap out assemblies, that way switching back is only a few minutes. Enjoy.