I just bought a XC Tour a couple weeks ago and took my wife for a ride just after I got it home. I was informed the vibes coming through the backrest were bad enough she didn't want to lean back. I have installed grommets where the backrest mounts to the trunk, foam tape between the brackets and the trunk base, and thick foam tape between the trunk base and the trunk. It is better but not as smooth as I would like. Does anyone know of any one that makes a pillow style backrest for the XC like those made for electraglides?