Why should I bother anymore with this board? I came as a new guy to learn and all I ever see is figthting and bickering. Why is it such a big deal to some, and others perfectly normal? I made the mistake of responding to a post and now I'm being nailed to a cross. There has been a handful of people that offered some encouragement and I do appreciate it. I want to advance and learn, Period. Also, I could see a stronger argument if I was going for cave diving or deep or wreck or trimix or solo etc. That would be rediculous. Nitrox is not much different than plain air you all know it and in the depths that I will be going, I won't notice a thing except extended bottom time. I should'nt be in any situations in the near future that would cause problems with oxygen toxicity. Don't get me wrong, I am not trying to be sarcastic or a nowitall. Because the fact is, I only know what I've been taught and am trying to learn more from experienced people but truthfully, am not getting very far. Also, keep in mind, its done, I can't undo the courses.