My shafts are all trimmed to give me a flex between sr and ladies. All my shafts are frequency checked. All shafts labels are not the same. Just because it says sr or reg that doesn’t mean that’s what it is. I have a real slow backswing so I can play more flex.
I switched to the Hireko prophet irons. Not the muscle blade. Love them. I had them custom fitted senior flex shafts. My son is custom club maker and said that his best selling iron head.