Does anyone have any instructions or recommended methods to close and secure an aluminum access panel? I have a fuel-tank cap close to skin surface and want a smooth panel cover to close and seal the door to the skin. I can make the panel w hinges, but would like a shallow, non instrusive (not hartwell latch) latch to secure it - instead use a pull-pin or spring latch mechanism. any pictures, diagrams, ideas to share would be appreciated. thanks Check/DR109