I am working toward making my hatches flush mount. My cover does not have quite enough curve so I am not going to be able to get the bungie system to work. What other systems have the folks here used and what results? I looked at the pictures here on the web site of the turn latches but could not tell, are they plastic, wood or what. Will they compress the foam gasket significantly or does the foam have to be trimmed so that is is the proper hight? Placing straps across the deck sort of defeats the purpose of the flush mount hatch, but I can do that if I have to.