More on this later but I think I have found and eliminated the cause of my problem........ excess vibration. Haven't had the bike to speed yet, so I can't say for sure.

Here's the follow-up on the dyna-beads after getting rid of the extra vibration. They're fine. They work. No problems. No ugly weights on the tire.
The theory is that the extra vibration was preventing the beads from settling into the light spot of the tire. Evidently they were just bouncing all around inside the tire instead of gathering together. Imagine strapping a bowl to a pad sander, fill it with little tiny tiny beads and then turn on the sander,,,,bead chaos. Evidently that was what was happening, especially right in the low 70's.
No more tire balancing for me and no more expensive tire changes. Time to start changing tires at home.
