A few things to remember
If you drill out the end of a conventional cue shaft, it is very hard to stress relieve it in the process. What this means is that there is a high likely hood that it will warp. Not all of them but too many of them to build them in quantity. Also, you have to be careful about violating Predator's patent. Be very careful here. They have been to court before!
Feel and sound. Feel and sound are 2 different things. Feel comes from low frequency vibrations which are lateral, meaning that the cue shakes side to side in your back hand. Sound comes from High frequency vibrations. These are Sound Waves that move up and down the cue several thousand times a second and cannot be felt. This sound over powers the feel and you start to listen to the hit instead of feeling for it. Try playing with ear plugs and you will find out what feel is all about.
Royce Bunnell
www.obcues.com