[Sinclue]

Ray,

Some sources for Marine sealants(online): West Marine, Boat U.S., and SailNet. Others on this board have used liquid nails with success.

Sounds like a good permanent installation. I think I would mount the heavier panel in the middle. It seems to me that maybe the weight on one side or another might result in some torquing of the shell when you open or close (possible scrapping or hanging up).

Remember that wherever you mount them you'll want that spot to be located to likely receive the most sunlight. If you are in hot places that makes for more heat on that part of your rig (and inside too).

jim