The use of tungsten in the other Titleist 716 irons stops after the 7 iron since it is deemed not needed in short irons due to their higher CG placement. Are the T-MB short irons going to have tungsten in the short irons i.e. throughout the set? If so, why does lowering the CG work in these short irons verses the other irons? Is it a true benefit to the golfer who may order these as a set? Thanks