Save yourself some money in the long run from buying different shafts, just get an iron fitting with those ZX7, I'm sure the info on the screen will give you the best idea of what shaft to useGot in 4 rounds with the zx7’s this weekend and I have to say I really liked the feel of them and they were fairly easy to hit. Not sure the set I picked up has the right shaft for me but were fine for a last minute pick up. I seem to hit the modus 120’s really high and lose a bit of distance but for the most part they go fairly straight. I would love to throw a different set of shafts in at some point and see how they do. Will be a fun comparison against the the t-100S irons next year