I'm coming up on my 52 nd birthday and looking at upgrading to the steelfiber shafts for my Titleist irons. Went to a shop and got on the mizzy shaft optimizer it gave me 89 mph - 5-5-5-7 at standard length, the optimizer recommended the KBS Tour X flex soft stepped 1x. I would like to know if the steelfiber i110 stiff would play close to the recommended KBS X ss 1x?