Well an expensive mistake when custom fitting advice is offered may I suggest you listen , had a set of mb 714 irons purchased in feb I play of 5 but these felt a bit flat so purchased a set of ap2 of the the Internet with project pxi 6.0 shaft 1100 pound could not keep down felt like graphite unsuited , so went local golf store and got measured for another set found I needed project x 6.5 another 800 pound so serves me right couldn't wait the ten days for custom build but had I done this first may have saved myself a few quid