[Mark Davies]

<font color='#000080'>Calling on Daz, Andy2Tanx and all the rest of you Inverts,

Following on from the&quot;Y-pillar&quot; thread, I've done some experiments and found that shut-downs are likely to be tricky, mainly because the valves will be closer together than on a twinset and so right behind my head - a bit tight of a reach for comfort. It shouldn't be a problem with an inverted cylinder though.

So, I've got a single 15 cylinder, inverted. A Y-pillar at the bottom.

From the right side I imagine I'd run my main DV and suit inflater. These hoses would run up under my right arm, the suit inflator running up to the centre of my chest (nice and tidy). The DV routeing is a little less simple, but we'll come back to that.

From the left side I'd have my contents guage and console (as failures are more likely to be with my main DV and so I'm more likely to be shutting down the right side I thought the contents guage should be on the left), my BCD inflator (which would run up my back, attached to the cylinder somewhere, and then over my shoulder) and finally my octopus, again running under my arm.

Now, back to the DV routeing.

Andy, I remember that you use a long hose for your main DV, accross your chest and looped around your neck. I presume the rest of you do much the same. If you were donating air you'd pass this onto your buddy and use your back up.

How do you route the back up? I imagine it can't come straight up under your armpit as then it wouldn't sit comfortably in your mouth. Perhaps someone could post a schematic diagram of hose routeing for inverted cylinders.

Thanks.