Range day. Let's start with the Ergo grips.
By a hair thicker they are 3 thousandths wider behind the trigger. Not noticably thicker in the hand but a much better grip surface. They were worth the purchase.
The hammer and trigger spring did not make the double action as light as I had hoped. Probably 9 to 10 pounds from 12 pounds or so, I had 2 light strikes in 40 rounds, needs work. The single action was an even 5 pounds over ten pulls and felt great. With old factory springs it was 5 and a half pounds average but went from 4 pounds 10 ounces to 6 and a half pounds randomly.
The reduced pull length trigger is nice for my short fingers. It sits about an eighth of an inch further back.
If I had seen the Wilson Trigger bar kit before I ordered springs I would have got it. The trigger bar is made to pull the hammer back just almost as far as the single action to eliminate light strikes.
I replaced the recoil spring with a factory weight spring, after I got my parts in a friend sent an email recommending a heavier spring.
That's my two cents. Groups yes. Reduced length of pull yes for me.
13 pound hammer spring, yes but I should have picked up the Wilson kit with the Ultimate Trigger Bar. It pulls the hammer farther back to give it more inertia in double action. Now I have to see if I can get it separately or buy the kit.