This is proably a simple question but I will ask it anyway. I normally dive with an AL80. I know the decompression tables using that. Would the no-dompression time change if you were using a 100 or 120 cu ft tank? I would think not because you are still uptaking the same amount of nitrogen regardless of the size of the tank. If that is true, what would be the reason to use a bigger tank if you are still going to stay with in the recreational limits