OMS 98's aren't actually any significant weight savings btw. 4lbs/tank when empty, you aren't going to notice that. Even cave filled, the full 98's are only 8lbs heavier than the al80's, which isn't that bad when carried as singles.
Razorista, 30% more gas amounts to less than 2.5lbs. Inconsequential in this discussion. If you chose to say that I went with AL80's with lead on them because that's what I get when I travel, and already had them, then that's a different discussion, but saying he did it to reduce the weight without specifying the tanks he was going away from is not accurate because it doesn't actually reduce the weight by any significant amount with most tanks, and when compared to smaller tanks like the HP100's, is just wrong.