Ed Sullivan wrote:
On Wed, 18 May 2005 02:01:52 +0000 (UTC), Brian Huffaker
wrote:

If these are the circular type inspection covers and the thickened
area you refer to is a plastic ring cemented to the fabric, you might
just rotate the cover to a new position and drill a small pilot hole
and start the screws in the new position.

No, these are square. It doesn't look like plastic to me.

Brian Huffaker