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Date: Mon, 7 Sep 1998 15:09:16 +0300 (EET DST)
From: Teppo J Kurki <tjk@cc*.hu*.fi*>
To: techdiver@aquanaut.com
Subject: Re: 7l doubles or 15 l single
>1. 7 liter doubles with isolator manifold and two first stages.
>
>2. 15 liter single with H valve and two first stages.

Having gone from 10 l/300 bar tank to 2x7/200 and now own also 
2x10/200 here's my thoughts:

15 l
+ cheaper (probably)
+ a little  more gas
- valves hard to reach (at the back of your neck)
- awkward because of large diameter (at least in my experience)
- need more weight

2x7 l
+ fit closer to your body => better balance
+ reaching valves a lot easier, since they stick out
+++ when you get larger doubles you can use _exactly_ the same setup and
you will have already mastered the right reflexes
- heavier on the surface
- more expensive

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