Great link to the bomb squad thread regarding the new UST recoil iron shafts-FYI Good luck finding the prototype versions (but I have several sets!)
Recoil Brochure with Specs-’13
I am the youngest with in a golfing family which has spanned three generations. My grandfather started the tradition in England (Bert Hodson-1931 Ryder Cup Team) and has since passed on his knowledge and love of the game. Although I did not follow in the steps of my father and grandfather on a professional golfing level, my love of the game and commitment to accurately fit equipment has only grown. Even as a kid I enjoyed re-gripping clubs which eventually led to refinishing wood heads, re-shafting, and now has culminated in more detailed custom club fitting, building, and repair.