Don,
I used "Chore Girl" Scrubbers first, and they simply did not quiet things down much at all. Second was fiberglass packing from the motorcycle shop, about 3/4" thick but soft and fluffy with a skin of sorts on both sides. I wrapped that as tight as I could, wired it in place with SS safety wire, and lit it off. It was a little quieter, but within hours I had little fluffy pieces of FG blowing out the pipes, and it was getting progressively louder. Took the baffles out the next day and I had four SS wires dangling on the pipes That's when I called CC, and they told me they have good luck with their SS packing and the FG wrap. I noticed that they now offer a baffle that has one extra center plate, four total, and they say that one drops the sound as much as ten decibles, which is a ton since it's a logarithmic relationship - each point doubles the sound heard. I may give them a try one day.