Reviving an old thread.
I have posted this on facebook cuemakers group before, with many 'experts' chiming in on the reasons not to add deflection to the shaft.
Well, i have done repairs for people in the international circuit ; top 5 in the world rankings , to ADD deflection to their CF shaft.
can't name them for obvious reasons.
But anyways, here is a revo with modded ferrule to increase deflection - it has a cynergy deflection now, with the characteristics of a revo shaft! super effortless and powerful. I have yet to experiment to keep it looking like a stock revo with added deflection similar to a conventional shaft - my ideal setup.