OT: swivel or elbow? What kind? Do you like it/reliable (if swivel)?
I know this wasn't directed at me, but I wanted to add my $0.02 anyway. We discovered Seacure molded mouthpieces 15 years ago, which helped greatly with fighting the hose-pull on our regulators. I switched to Atomic with integrated swivel a few years ago and it's a game changer from perspective of jaw fatigue, especially for extended dives like we enjoy on Bonaire. I can't believe it took me this long to get smart and I'll never look back. Next up are double-braided flexible regulator hoses.
Eventually I hope to go wireless.