Eric in North TX wrote:
I've had several of these knot up over the years, not regularly enough
to just replace them, just often enough to be an annoyance. I've tried
many types, all seem to have some draw-back. I'm looking for product
recommendations, modifications, anything anyone has done that worked
for years. I can tell you some things that don't work; the rubber
straps with the arrow shaped stops (too rigid), the fluid master black
plastic chain (worst knotting problem to date, it floats hence the
tangles).

I have never seen a "knotting" problem with any kind. I have had a
problem with a link (usually the top one) going sideways when flushing
and then not letting the ball fully close. That is simple to correct,
just hang a small fishing weight from the link. That ends that
problem.

Harry K