Ok,, I can see what is happening here,,, its aka the snowball effect. I wasnt asking about tables,or really any adivice to put myself or others in harm,, Basically I’m trying like I asked whats the perks of this??? I’m not running out and buy new gear just do this, and IF it seems worthy, maybe ill look into getting certified for nitrox,, which was another question I had, which pertained to The schooling, If it is a open water type or just sit in a room? cause maybe I will weigh the odds and Pay for a different cert. and judging the comments the way they were posted and Being a Certified Harley Davidson mechanic I take it you all take your vehicles,lawnmowers,snowblowers, etc. To a Qualified/Authorized Dealer? And in the sport of diving, If you see a diver having problems before or during a dive, Do you say "hm looks like youve got problems you better go to your dive shop and have it repaired" or do you try to help them if its a small unsophiticated problem? I wasnt looking for training,,, its called advice