I'm a tall guy, too and have the scars to prove it!!. Do you think countersinking the nuts (in this case) into a thin stainless plate would work. The plate may have to be just a bit thicker than 1/8 to accommodate the countersink correctly i suppose. That aluminum looks like 3/8"?
My deck seems ok, But I am going to put plates under the winches and maybe the clutches after reading your thread. Mainly, i want to get 'em off and pot the holes if they haven't been done.
