Yeh, BOUNCE is the word....
That does pretty much describe what must be going on inside that box,,especially at higher throttle openings. The touring (as far as I know) always had the cats in the front of the mufflers, so the crossover box is just an empty can with bad flow characteristics. My R3T already had the D&D setup on it so I never had any cats to get rid of. I'm still laying it out and trying to get the angles right, but I'll post the final result before I put it back on the bike.