Hej du,
Here is a sample setup. I use this one setup for diving in Puget Sound (49 degrees F water) and Hawaii (85 degrees F water), and anything in between.
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You can see here where my hand is that the low pressure inflator hose comes from the top, and goes over my shoulder to the BCD hose. I run one of Bryan's angle adapters with my drysuit hose coming out of the bottom of the kraken. The miflex hose that you see by the horn is a 5 foot miflex hose, and I run my alternate second stage off of it. Then, I run an SPG.
More pictures:
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cold water drysuit hose with the large knurled flange.
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20 degree angled adapter for the drysuit hose.
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The SPG Bryan sells with built in breakaway.
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5 foot Miflex hose with alternate second stage.
I use this setup, and just take off the stuff I don't need. In Hawaii, I was using just the regulator and SPG. Here, I use everything for drysuit diving. I bring everything in one box and rig up only what I need. When I run the alternate second stage, I just tuck the hose in my waist band of my backplate and wing just like a 7 foot hose, but without the wrap around the body. Older DIR guys used to do this for singles diving back in the day, and a 5 foot hose is still plenty for donating a regulator.
There you go, and you can basically do anything recreational with this one setup. I also recommend Bryan's plate, which I use as well.
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The impossible missions are the only ones which succeed. -JYC