Oh, I've had those tank slappers, and they ain't fun! Going over the Big Horn in Wyoming loaded to the gill with tent, sleeping bag, camp gear, .45acp, and all the crap you pack for a trip to Sturgis. At 90+ mph is was more than scarry, it was down right terrifying. My brother was behind me on his Road King, and saw the whole thing. When I got her slowed down, and pulled over he said I was as white as a ghost. It was after that trip the Bagger Brace went on. I don't recommend inducing these wobbles, it takes nerves of steel to go through one and come out without a changed perspective on the afterlife. Of course, I've got a pre-09 model, so I can't speak to the newer frame changes but any improvement would be a plus. Ride safe out there.