Thanks for all the input. Very informative. And, to answer Dutch, this case would be glass ferrules, but it sounds like there is much more to the question than making a solid contact than what I had thought.
If I glue a 2-piece rod together (well), is the sensitivity similar to a 1 piece rod? Or, does it just increase it some or not at all? (Not necessarily an upper Taney question, but lots of expertise here). Thanks for any input.