It's actually kind of interesting to think through how to do things with only one arm available. I'd still put the can light on the right hip, I think, because it routes the long hose properly. Some people route the SPG under the arm and clip it to one of the front D-rings so you can just glance down and see it -- That might be an option for you.
What's bugging me is trying to figure out how you can wear a computer/depth gauge on your right wrist and ever get it lit. I use the penumbra from my can light to read my gauge at night, but you'd have the light head in your right hand, so that lets that out. This might actually be an argument for an air-integrated computer like the Cobra, that you could clip to a front D-ring and have accessible to your right hand and your light, which would give you a depth gauge you could glance at that would integrate your pressure gauge. Not classical DIR, but a justifiable workaround, I think.
One of the things about DIR is that nothing is truly written in stone -- As my instructor has said again and again, you have to make choices by recognizing the pluses and minuses of the strategies you choose. And your strategies are heavily constrained in a way that most of ours aren't.
What's bugging me is trying to figure out how you can wear a computer/depth gauge on your right wrist and ever get it lit. I use the penumbra from my can light to read my gauge at night, but you'd have the light head in your right hand, so that lets that out. This might actually be an argument for an air-integrated computer like the Cobra, that you could clip to a front D-ring and have accessible to your right hand and your light, which would give you a depth gauge you could glance at that would integrate your pressure gauge. Not classical DIR, but a justifiable workaround, I think.
One of the things about DIR is that nothing is truly written in stone -- As my instructor has said again and again, you have to make choices by recognizing the pluses and minuses of the strategies you choose. And your strategies are heavily constrained in a way that most of ours aren't.