I think he is just detailing what can be done with regard to both ideas. Not suggesting one over the other. I read it as he was suggesting the same as you to...
Which is what I have asked cue guy to do for me
Again, thanks for the help here guys. I am going to watch him work it out, as I find it really interesting.
Edit: I think I actually understand your point now, just re-threading the existing joint of the shaft? I am not sure as these particular shafts have an insert (Which is carbon or plastic? it's black that's all I know) for the thread, which maybe needs to be replaced and is difficult to simply re-thread? Maybe it is removed and replaced with wood section?
I will see what cue guy suggests and update here. Either way, I will be adjusting the shafts and not the butt. I'll post some info/pics on it when I get back from work.