over the years i have heard of players marking a shaft for repeatabilty
it makes sence
This is certainly a fact, I personally am not one of those chasing the Holy Grail of non-deflection, so I do not use a laminated shaft and I never will. Now, I am not saying that they don't work or even that people should not buy them, but for me they are a waste of money.
Getting back to the thread, I do allot of repairs and refinish work on old cues. When I first started I use to wonder why many of the older cues would have a pencil, pen, or other mark near the shaft collar. Then I realized that people were marking their shafts where they felt that they were getting the best consistent action from that shaft.
In my opinion any shaft can react in a consistent manner if the owner has a good stroke and consistently uses the shaft in the same position every time. If a player does this again only in my opinion no matter how much deflection or lack of deflection a shaft has they can achieve a very consistent hit and play using English or center ball.
One thing is for certain, a cue and it's shaft are only tools which really have little effect on how some one plays. This in a nutshell is why I do believe in the myth that many profess to be a fact, playing good pool is all based upon personal ability not on the latest tool that has hit the market.
So yes, marking a shaft and using it in the same position everytime will give a player the same effect which can be good or bad based upon their individual ability, not whether there is deflection or not.
JIMO