Gerald,
There is a simpler soloution. Just give the strap one or two twists and the
drumming should stop. I use that trick when hauling my canoe strapped to
the car top. See this photo: http://www.spearfishcreek.com/pics/car.jpg I
noticed the straps are not in the photo but they run over the top of the
inverted canoe to the car top carrier and not bow and stern.
Royce
www.spearfishcreek.com
>
> Last week I finally acquired a CIPA 11650 clamp on door mirror. I had to
> make a bracket bolted to the door for the window sill clips that didn't
> get along with the Ford's window gasket. On the first road test the flat
> nylon strap vibrated violently drumming against the door.