Thanks!
Thanks for the great replies. Wow! I had no idea. I started some internet research because of the great information here and found a brilliant site discussing ferrules:
http://www.dzcues.com/ferrules.html
My thoughts, as an engineer coming at this topic from a position of ignorance follow.
I though the fundamental purpose of a ferrule on a cue was to strength the tip to prevent if from splitting. So, if the shaft is strong enough and not prone to splitting, no ferrule is necessary, right? You can do as "Icon of Sin" does, and simply glue the tip (with perhaps a pad) directly to the shaft.
To prevent splitting, though, you would fit a ferrule. I would think that you'd use the thinnest ferrule that would provide sufficient strength and longevity.
But then, there's tradition, which I value. And there may be some other properties that ferrules impart that I am not familiar with. Maybe a strike on the tip transmitted through a ferrule has a different character, maybe better, than a tip on a bare wood shaft produces.
I confess I intuitively don't like the threaded interface; a press fit with an open top, with the tip glued to both the ferrule and wooden shaft appeals to me, with a fairly thin-walled ferrule. But this might cause problems with different thermal coefficients of expansion of the shaft and ferrule materials, not to mention movement due to humidity. It might destabilize the tip glue joint.
I just don't know yet. What I
do know is that what I currently have on a couple of cheap cues is very poor!
Still learning....