hi folks, i'd like some advice please! a little bit of diesel is accumulating in my trunk, beneath the tank. i have wiped it off and waited for it to reappear, and it appears to be traveling down that little support arm from the filler. now, that rubber (supposedly viton) grommet inside the fuel door has warped and shows gaps around the sides, but i don't imagine diesel is leaking upwards, out, and back in. that the solid neck portion of the tank would have fatigued seems unlikely too. where would you look next?