ianr33
Contributor
My octo is on a necklace. I can see the reason if diving with a long hose or if using a cannister light which I don't (yet). I'll switch it over to the right side which will free up access to my spg and bc inflator.
But then you will need to relearn everything when you do get a long hose!
Another point is that the best way to route the reg once it is deployed from a pony/stage/deco bottle is over the back of your neck so it feeds from the right (same as all other regs) A 40 inch hose is pretty standard for that. With a tank slung on the right you would need a second stage that can have the hose on the left (e.g Apeks XTX)