I just built a set of Sti OS irons. They have XP 95 regular shafts. Used them for the first time yesterday with much less than expected results. I normally hit a high iron shot. especially with my 7- W. Every club I used had a low trajectory and not even close distance to my previous set. Those irons were Ping i 20’s with a stiff flex CFS steel shaft. Somewhat perplexed as to what may be going on. Any suggestions would be grateful.