Re: Wilson Staff Iron Shaft FlexesI have 2 sets of WS irons, the Ci7s in a stiff TX-105 steel, and the Di9s with uniflex TX-99 steel (the weights being 105g and 99g respectively). Though I could get away with stiff flex, I tend to play regular flex shafts for a bit more kick. To be honest, the stiff TX-105 in the Ci7 is a bit too stiff for me, which is one reason I stopped playing them. If OP was a lefty, I could sell you my set (very lightly used). The TX-105 are definitely not a whimpy stiff flex. The uniflex shafts in my Di9s (technically fat shafts) are great for me--definitely a nice happy medium, not too stiff, not too whippy (and I like the 99g weight--I don't need a real heavy shaft).
So while you still may require a stiff shaft, the uniflex could work for you, but obviously you'd need to try it out for yourself. And I am not sure what the specific uniflex shaft is in the Ci7s, since the Ci7s were only offered stock with the TX-105 shafts, regular or stiff, at least initially.