Switish plus the fact that they deliver
vast amounts of gas and are easy to service.
I wouldn't pay the extra for Omniswivel, just get full flow CEJN fittings (some male fittings designed for drysuit valves have a restricted bore). Much cheaper. The locking tabs on Omniswivel fittings are an absolute ballache with gloves, a straight drysuit hose does the job better.
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Caliph Hamish Aw-Michty Ay-Ya-Bastard, Spiritual leader of Scottish State in England
After consideration I went with the Omniswivel connectors from narkedat90 with the check valves. here
I didn't like the additional adapters required to fit the Swagelok which resulted it quite a big lump on the hose end, although hadn't seen the hose ends from narkedat90 before today. Also the male Swagelok's seemed a little fragile as it's quite long.
I have a miflex hose connected to my GG Shrimp and run it over my shoulder down behind the wing and connect to a short hose on my bailout. If carrying multiple stages it's connected to my bottom gas. I don't have a gas switching block so when I switch to next gas I just switch regulator, I feel this keeps things simple which I like.
All posts here are my personal opinion. Do not copy anything or put jelly in the toaster.
I swapped to Swagelok as a lot of my diving is from a RIB and the omniswivels were more difficult to disconnect one handed in the water while hanging onto the boat. Both connections benefit from keeping them clean. A have also found that the swageloks can get surface rust on the female collar - doesn't affect the functioning but doesn't look great on a nice SS fitting. If it wasn't for the easier disconnect, I'd have stayed with omniswivels.