My wife and I both experienced that rattling on Diamondback the last couple of years enough to comment about it being a bit "rough", which most B&M's are not. I also felt it on Gatekeeper last year, but those are the only 2 B&M's that I've felt it on. Not enough to make me not want to ride, of course, but enough to make me think, "What happened to the smoothness of the first year?" Hope Banshee avoids that.