Hi. I'm looking to change the tour issue S400 shafts in my set of 716mb's over to project X 6.5 or 7.0. I don't want to replace with DG x100. Set is currently standard length and swingweight / standard TV grips. Does anyone know, can titleist factory replace with the project X shafts I am looking at with no impact on current standard specs including standard factory swingweight ? I'd rather not sell and have to buy a new set again. Thanks.