Ya know, the more I look at those original side curtain mounts, more I see potential. They would be strong, they don't require holes in the exterior of the door, they don't require that third hold-down strap in the center. One could make the bracket to accept a flat strap or a round rod. Both could be secured with a flat or domed set-screw-knob. This would lessen punctures in your body on impact than that wing-nut. They blend in easily with the door hardware, ie, door handles, pull handles and door latches. Gotta rethink this a little...............Bruce
P.P. Gordon, your hardware application is really nice. Simple and minimum too !