Given that it "might pull through the metal", might it not make sense to use a LONGER bolt for shoulder harness and put the washer (or even a drilled PLATE, on the OUTER side of the car (presuming it is accessible) pus another nut FWIW Peter Harrison - Eliza [TOAD SAN] 818 448 3181 > A very fat washer. Or it might pull through the metal.