Whelp I am gonna find out. I've been experimenting with Kirk Junge's single plane Setup for Impact using old Sterling irons 5i, 7i, 9i, PW and SW all S2S Stepless "R" Apollo steel 36 5/8" 63 deg. I think there is a good correlation to using single plane swing with single length irons. I haven't had any issues using PW and SW at slightly longer length than traditional for me. The main dividend is the long flat spot and straightness of shots with single plane.
So, after a few more 9's I am going to build a new set of Wishon EQ1-NX irons probably stop at 6i and go to 5hy as club head speed will dictate using a hybrid single length head vs. an iron head. I'll also use Wishon S2S .335 hybrid shafts which will yield a bit higher trajectory in the single length hybrids. Junge's single plane has dropped my normal higher trajectory as I am delofting not adding loft or flipping as much as with my double plane swing.
