Shoegoo on the inside FTW. Do it where the tires rub the fenders too, and they won't rub through the paint!
I ended up just hot gluing the washers to the inside of the body. It was too much of a PITA to cut out the servo tape as all I got is the clear streachy stuff.
Good idea on the shogoo for the fenders, I'll pickup some before we run the trucks.....