Agreed that Steel 85's rock!
With ladies having usual better gas consumption then guys this is a great way to go.
You can use double alum 80's but they tend to swing way positive when empty.
If and when you buy doubles something to do is to float check the set up with about 500 psi in your tanks. That way you know the positive swing when they are empty.
If you try this and weight of the tanks are too much then you could always consider side mounting the tanks. In the past this has been a bit of a gray area but it is taking off with certain groups. The nice point for this is it is easier to move the tanks and you do not have to mess around with banded tanks.
I have to point out that you would have to be able to exchange regulators underwater and be able to balance the gas consumption from two tanks instead of one set.
The positive is you can see the valves and do not have to reach behind your head for valve drills.
Also there are a few rigs being sold for this- Diverite Nomad, Diverite parts, Armadillo, and a few others.
Just trying to add to the fabric of the conversation.
Later, Andrew
