doc: what the heck navy were you in? the ships i lurked on, the hinges were always on the port side ! made of beautiful naval brass. they always soaked up their weight in brasso when it was time to make things shiney !I really like this clever concept and the design execution is also great. However, I do have one problem. Portholes are almost always hinged at the top (there are a few that are hinged at the bottom). So if you put your hinge on top, the shark would be almost upside-down. Sorry for the hair-splitting.