Gentilmen, another thing I've found that I think is critical to check, IF, you are having the same problem as me.Along with checking the fender stays for loading the frame, you must ensure that the notch, at the front of the fender is properly seated into the rubber bushing, on the mount, on the frame, under the seat. That rubber bushing seams to have a dampening effect on the whole tail section of the bike. I guess it, gets rid of that tuneing fork effect. It's seems to be a good design, and something that was anticipated, but if not installed correctly, I could see where it would have a negitve impact.
Dan.