We installed the Trimatrix Ports from NFM. They were cost effective being a little less than half the cost of the metal ones. They are robust enough having a similar construction to the metal ones but in plastic using stainless front and back plates supporting the screws. They did leak a little in a tropical storm that dropped buckets of rain for a 16 hour period, otherwise dry in all other instances. Check out the pics in my album. I looked at the all metal ones but since the original Grey's were good for 30 years I figured new plastic ones would probably outlive me owning the boat.
