Hi,
I recently brought a Titleist 910d2 with the Diamana ahina shaft, I noticed on the Titleist website that the recommended weight with the ahina shaft is D4 which I believe is a 9 gram, however the weight on my driver is a 7 gram which is D3 I think. I was just wondering what difference this makes to the drivers performance?, and also is it worth changing to the D4 weight?
Many thanks for any response. Jack