SO!! Repacking mufflers. WHAT ... a chore. Would prefer to never have to do that again. Are there any aftermarket mufflers that don't need packing? How awful is the S muffler? I have a nice fat CRD full system, header/midpipe is probably equivalent to a good Yoshimura. Would the S muffler choke it up horribly? Has anyone done that DR650 exhaust mod on a DR-Z, that GSXR titanium muffler deal?