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How do the "automatic hinges" work?
With reading on the website and looking at NFM's website, there's one thing I don't understand: How do these hinges work?
They are spring-loaded, and are supposed to open 45 degrees if I read correctly. They say you can open them more. They also have chains to hold them open. There was an older complaint about that in this thread. We tend to open our old ports all the way to the headliner (~120 degrees) to get them out of the way. At 45 degrees I'm sure some would be head knockers, and all would be visually in the way.
I don't care if I have to push them open, I just want them to stay up. Do these ports need a chain to do that or not?
FYI, our background is that we're in the middle (argh!) of removing the (two year old) Beckson plastic ports on our boat. We aren't very impressed with the ports, but they were installed badly enough to leak, so they gotta come out for sure. Might as well do all nine of them, even though some may not be leaking (yet!) Half-way through we're ready to continue removing, but may skip the idea of re-installing them, and these NFM ports 5x12 SS model are looking pretty attractive instead.