Looks good John! One advantage of the copper pipe relative to Fellowship's PVC plugs is that flow area is much bigger! Where do you get the nitril gloves you're using? They look thicker than the ones I'm using.
I've attached a couple of pics of Fellowship's design, although I've modified them by carving away most of the top with a Dremel tool so they don't stick up much above the brass tube. The second one is discolored because it was in the boat in the water in the Keys for a week; used it again a couple days ago. I don't cut off the tip of the glove, but just poke a slit in it with an X-Acto knife. You do have to sort of wad up the glove finger so it doesn't get pinched between the brass tube and O-ring when you insert it. The longer fingers seem to seal best but are a little easier to pinch if you're not careful.
They work pretty well, especially for diving or fishing where you're gonna have water on the deck anyway. If you're anchored with folks sitting in the back a little water will sometimes seep in. Haven't had much trouble with them trying to flow backwards, but putting a piece of wire across the hole at bottom of the PVC fitting would stop that.
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