Switching from 710 AP2 to new 712 MB's later this year...love the feel of the MB. Question for Titleist expert...am using semi-lightweight (111 g.) Nippon NS Pro 1150gh tour w/AP2. Does MB require a heavier shaft (DG or Project X) for optimum MB clubhead performance?? The Nippon 970 or 1050 is a little lighter weight (98 g. to 105 g.) and smooth feel, but I wonder if the MB is made for a heavier shaft to perform best...knowledgable opinions?? Thanks very much (I'm 54 but strong, but was thinking of a lighter weight shaft with mid-high trajectory...maybe also Project X flighted?)