I'm trying out a combo of Atomic Aquatics swivel hose + 70 Degree Swivel Adapter, LP 2nd Stage: 9/16-Inch M x 9/16-Inch F. The 70 degree thingy routes the hose to the area I want it to be, the Atomic swivel hose gives me some easy wiggle room for fine placement.
Swivel plus a 70/120 degree is just goofy. Why add the extra failure points? Stick with one or the other as the swivel defeats the purpose of a 70/120 degree adapter.
Who has a 24" yellow hose for my octo? Would a 30" be ok. I'll get a neck bungee for it.
You'll want something shorter than that. Standard is 22", and for a single tank where the valve is a couple inches closer you may want even shorter. They're cheap at less than $20ish for that length.