Hey Fred, yes I just changed the uppers. I did some research and most articles say the lowers are fine, they make a plate you can weld on the bottom to make them stronger and that will save you a lot of money. Mancini's has them for $21.95 and your professional welding !
I saw that kit and thinking maybe doing that or the QA1 lowers. Do you remember the cost of your uppers I am wondering if the cost I see is for the pair or just 1. Seems kinda expensive if just 1.