Those are some great videos Keeb. Too bad you don't line up your cue under your dominant eye! Think of how much better you'd play!
All kidding aside, I liked what I saw, and it was presented very clearly. A couple of tiny corrections, imo.
First, I love the way you presented the concept of the finish position for the grip hand. Next time also reinforce that the tip goes to the same place on the cloth too. Second, the significant difference between the piston and the pendulum is accuracy, not power. Power comes from stick speed, and perfect timing...not muscle. If the break was only about power, then the 800 lb. gorilla would have the best break (they don't!). One of the big myths about the break is that you should be trying to put body movement into the break. It's difficult enough (for 99% of us) to accurately strike the CB at high speed (especially without a death grip on the cue). Matching your swing up with moving your body is VERY difficult, for all but the best players...and I think way too many people obsess over getting body weight into the break than can really benefit from it. As you mentioned, develop a repeatable swing, back off on your stroke speed, and contact the front ball of the rack squarely, for a repeatable break shot. Remember, the CB is gone 1/1000th of a second after contact, so all that extra followthrough doesn't do anything (for most players), other than make accurate contact that much more difficult.
Great job! Kudos to you and Marcus.
Scott Lee
www.poolknowledge.com