I am no expert, but I would have thought that if the octo hose was thick/strong enough for an octo, then there is no reason why it shouldn't be used for your main reg.
Of course, you could have just kept a long hose and bungied the excess down the side of your tank.
Oh yes and you can get swivels for regs that you just screw in-between a normal reg fitting and hose.
Paul
"Keep away from people who try to belittle your ambitions. Small people always
do that, but the really great make you feel that, you too can become great."
- Mark Twain