Joey, are you going to vouch for my teaching ability far and wide if I open your eyes far and wide on this topic? With a conical taper, snooker players more readily appreciate the taper's affects on each shot because of their open bridges. If a shaft is conically tapered rather than an even pro taper, the center of the cue tip RAISES in position relative to the cloth and you can observe the effects for yourself by experimenting with an open bridge. Now since we use closed bridges quite a bit over here, if the parts of your hand guiding the cue's path are unevenly distributed laterally, then this RAISING effect is translated into LATERAL movement of the cue tip during follow through. Take a rigid guide made in a v-shape and turn the v slightly sideways so that when a conical object passes through it it is pushed more to the side the "v" tips toward. Also, add to that a v-shaped guide that is softer on one side than the other and this magnifies the effect. Make the conical object (shaft) big enough and eventually the diameter will eventually push the shaft right off the guide onto the cloth. In a game of precision, imagine the ill-effects on aiming at eight feet. There really isn't much more to understand about this. I have never, ever seen anyone else mention this in print or in person, and when I teach someone to bridge I mention this always. Does this knowledge get me comped into a BCA teaching certificate? Anyone?
I would tend to disagree. First, if what you were saying is true than most 3CB players would never make a ball, in a sport that accuracy of cue ball striking is of utmost importance. Second, if the tip is positioned within 1" or so of the cue ball before striking than the diameter change from there to contact, even on a straight taper such as a house cue, is only about .012". Halve this for the movement on one side of your bridge and you get .006". There are not many shots your going to miss by moving your OB contact point .006". Take a shaft with a more parabolic taper and that number may be even lower than .001" depending on bridge length. How much the shaft rises after you hit the ball is irrelevant except from a personal comfort point of view and that is something open to change. If your theory was correct than how could anyone make a ball with a house cue as they generally have the fastest rate of rise? Like most other parts of pool and aiming at some point if your paying attention to what is happening your brain will adjust your aiming point to where you make the ball instead of missing so any movement, such as your talking, makes no difference anyway, you simply move your intended aiming point until the ball gets pocketed.
Kilby was the one I turned to to test my laminated shafts many years ago. I created different shafts that he put his unique taper on to see which version created the most power. As Ron states, vibration is wasted power. For my 2cents worth, the cue should go through the cue ball, not buckle like a noodle and the amount of "work", as I call it, is the first thing I look for in my finished cues. I am looking for how much energy is lost or gained while striking the CB.
Bob Danielson
www.bdcuesandcomix.com