OK,
I got to page 10 of this thread and couldn't take anymore. If this has already been adressed, then I apologize, But....
From my observations of this guy's answers and his attitude it seems to me that:
1. He was on an 80
2. He did NOT go to 200
3. He's a young kid, possibly new instructor or DM and trying to look cool for friends/peers
4. He does not understand gas planning, redundant air, or the way doubles work.
5. Anything technical he thinks he knows, he learned from reading these boards.
6. Will not listen to anything we tell him because he hasn't been hurt yet, so it doesn't apply.
You guys have to realise that this guy really doesn't know anything as evident by his posts. He's just an open water diver/instructor. All this discussion about independant doubles, and gas management go right over his head. You are all feeding into his delusion. And taking his posts as face value (barely used my second tank), then having a discussion about his lies is really a waste of time and bandwith.
There are alot of good people on SB and TDS, please spend your time helping people that really want to learn, and stop feeding the fruitcakes like this guy.
I'm going diving now...
Cheers