I am planning to order a 910 D3 8.5 with the RIP 70 shaft soon and had some questions about the flex. I currently play with a custom I15 8 degree (WRX) in which the head is bent 1 degree open and plays to 7.5 with a UST mamiya axiscore red 69 stiff tipped 1 inch. It took me three different shaft changes to get this shaft flex right for my swing and I don't want to go through the same experience with the 910. The RIP lowers my launch and my spin stays pretty similar (low) which I am looking for from the 910 compared to my current setup. During my fitting with the 910 my SS was around 106 to 110 but increased to 114 a couple of times when I went after it. I was using the RIP 60S and felt that I was at it's limit. I am looking for feedback to get the RIP 70 flex in between a stiff and a X stiff. I best guess would be to tip a stiff but by how much? 1/2 inch, 3/4 inch, 1 inch???
Thanks!
Ryan