I just picked up my 03 FJR (new to me) yesterday and rode it through 70 miles of rain in Chicago home. I noticed a lot of crap got thrown up on the bottom side of the Givi Top Box. My Triumph Trophy has a rear fender extender that does a pretty good job of keeping the sludge down and I wondered if there was anything available for the FJRs that looks decent. My research has not come up with anything, so I am thinking there must be some down side in installing a rear fender extender. Thanks for the input.