It has more PROs than CONs for me. In earlier triggers I was making classic stopper with hole for pin. As you may know my trigger isn't made completely on CNC , so some drill operations were made by drill. It was impossible to make it every time in same quality. When I don't drill it directly where it should be it cause problems in cylinder. Spring guide wasn't aligned with piston and there starts problem with cocking. With no hole is ,, self-centering,,. Almost every after-market trigger using this or similar design.Springer, the stock spring guide stopper has a small indentation where the small 'pin' on the back of the spring guide goes. Why is the spring guide stopper on your S-trigger smooth?