Jacoby ultra super pro shaft turn down

[cueguy]

Does anyone know how far this Jacoby shaft can be turned down safely?

 

[jokers_wild96]

Not trying to be rude but best one to ask is Jacoby directly.

 

[Highmiles]

Jacoby says not to turn down more than half a a mm.

 

[Burnett Custom Cues]

I won't turn down low deflection shafts. Most of them have pretty thin ferrule walls to lower end mass. If you turn them down, you are asking for failure imo.