Hi Bob, sorry for digging up this old post lol, but this effective weight of the cue is constantly bugging me. I read all your and Dr.Dave's comments/articles in this post, and what I don't understand is, what is the criterion for determining if the weight of the hand is involved in the impact or not? How do we know that the normal grip adds 1% of effective weight to the cue? What is the reasoning behind this? So far my own explanation is that the palm is very flexible, so during the tip-ball impact, the cue slides on the palm as if there is no hand: the skin effectively serves as a lubricant between the hand and the cue. Therefore the hand doesn't participate in the collision at all (in practical sense). Does my explanation make sense? Or did I misunderstand something?