All right you geniuses... someone must have had this problem before...
I picked up an Aquatica 4" dome recently. It's a handy little thing, and I am very glad I bought.
However, the little neoprene cover that came with it is useless. If the port is off of the housing, and doesn't have an extension on it, it's barely ok. Once it's either mounted to the ring, or the housing, there is simply no way the cover will stay on. It isn't deep enough to cover the ring etc.
A friend out west had a rigid cap made for his, with some little spring loaded tabs in it... works well, but it's complicated. I fiddled with a couple of ideas but no joy....
Has anyone come up with a solution for this? This thing wasn't cheap, and I'd really prefer it not get scratched!
I didn't find the right solution from the Internet.