With stainless steel or tungsten weights I wouldn't use glass beads because the hard metal weights will chip the glass beads. Besides the hard metal weights don't need the beads to make noise. They will make a plenty of noise just tapping against a swivle. Switch to a weight that has a concave bottom like a bullet weight that way the out edges of the concave end of the weight will hit against the swivle rather than slamming against the knot on the swivle. You just need to use a swivle large enough so the weight's outer edge hits the swivle with out touching the knot.

Here is the problem, While fishing the C-Rig I'm having to re-tie the knot at the swivel about every 20 cast or so. The line is fraying at the swivel where the glass bead and weight sit while in retrive. I'm using 15lb bass pro fluro with a stainless steel barrel weight with standard red glass bead. Any suggestions? Also what is the best knot to tie fluro?

Thanks in advance