Parts not compatible - Powder River Precision Springfield Echelon Trigger Kit

My gunsmith installed this kit into my Echelon and the trigger would stick. And if you put your finger anywhere on the shoe other than the very bottom, you couldn't pull the trigger. Luckily for me my gunsmith had experience with this problem before and was able to fix it. He had to use the original SA trigger shoe & spring. Obviously, PRP did not do their homework on this Echelon kit. Very disappointing!