I recently got a custom fit for a titleist 915f 13.5*. The recommended shaft length was 43" with 0.5" tip on a oban kiyoshi white 75 gram shaft. I've decided I want to go with the 915f 15*; would the recommended tipping still be 0.5"?

Golfsmith seemed surprised at the 0.5" rec and thought it should be 1.0" and recommended I reach out to titleist before they starting cutting the shaft.

Thanks for your help.