So, I went through a fitting session with a Titleist rep yesterday. I ended up hitting the 10.5° 917D2 w/ Mistubishi Diamana S60 shaft @ 45" pretty consistently. I was actually surprised at how well I was hitting it given my aversion to 45"+ drivers. Anyway, I'm wondering if that shaft is the same as anything available in the component market or if it's proprietary to Titleist. Does anyone know?