I'm running the SE II slip-ons on mt '05 XL1200R (old ones - not the new "shhhh"... ones) with Big Thunder City Baffles. I am going to swap back to the SE II baffles to check the difference. I've been riding with the BCT's for 4 years now and am curious about the difference in sound. Has anyone else gone back to SE II baffles from BCT's, and if so, what's your opinion?