I have a friend who I have been singing my praises about my AP2's w/project X 5.0 that I play. He's currently plays a senior graphite shaft in his irons. I think I have convince him to try the AP1's, but he says to 5.0 shafts are too heavy for him. Is there a light steel shaft that Titleist recommends that would be around the same weight, or maybe a little heavier than a senior graphite shaft?