I just dropped a Sig Armorer Super Strut and the included #20 mainspring into a new & unfired P229 Legion.
The small amount of crunch I felt at the initiation of DA pull is almost completely gone and pull is an ounce lighter. It’s presently breaking at 8 lbs even, according to my cheap RCBS spring gauge. (Previously it was maxing out the spring, which I guess is around 9 lbs).
I have a #19 mainspring around somewhere that I’ll play with at a later time.
The Legion trigger is good out of the box. Now it’s better. I’m a believer.