My friend is using Project X Flighted 6.5 for all of his vokeys. Its awesome however I am using PXi 6.0 for my 712 AP2 irons and want to switch 46/52 SM4 Vokey from s200 and s400 to PXi 6.0 or 6.5 to swing consistency in full swing as my other irons. I would keep s400 for 56/60. Hope someone here to reply before I go and replace 46/52 shafts soon!
Thanks!