Chuck
Is this for a break cue shaft?
I see two possible changes that could take place.
One could contend that the cue ball squirt will be reduced because there is material removed from the center of the cue shaft. Most importantly would be that material removed closest to the tip end. I think there will be a reduction, but don't think it will be substantial. Basically, the amount of mass removed is not significantly less than that of the carbon fiber tube that replaced it. Also, the large G-10 ferrule will add quite a bit of mass.
I do think that the carbon fiber tube will make it break a little harder. That is provided you hit the middle of the cue ball.
I'm looking forward to hearing your findings!
I really love R&D!
Royce