I find that road dirt makes the white nylon less conspicuous in short order. If the muffler is tied up into place, I don't think many tailgaters will be able to see it - if you don't leave long dangling ends. I've never had one jump off. I either use a couple of square knots (not optimal, but effective so far), or one of those specialized nautical knots - that I only learn long enough to use once every several years. If I've used it recently, I use it on the muffler. If it's been too long, then it gets a square knot or two. It seemed like I was replacing those rubber donuts every year or two (regardless of source) - multiplied by too many cars, and it becomes a hassle that's easily avoided with a bit of nylon.
-- OK Don, KD5NRO Norman, OK "Even if you're on the right track, you'll get run over if you just sit there." Will Rogers '90 300D, '87 300SDL, '81 240D, '78 450SLC, '97 Ply Grand Voyager
