The mud guard over the rear wheel has given me issues with rattles and such so I removed and attempted to re-attach. However one of the hex bolts will not screw in - due to the threaded insert in the rear chassis that holds the guard having fallen off. So there is a hole now but no threads and too big. So I have bought too many threaded inserts to count in M8 size and although they work for the bolt they are either too big or too small for the hole in the chassis. Driving me crazy. Anyone have any ideas or a part number??