Carl, the cage looks pretty stout to me, but in looking at your fire bottles, those attachment straps make me shudder. Although they may be o.k. by the rules, I like to visualize what will happen if and when I am in a pencil roll crash. If a bottle were to come loose, no helmet or fire suit is going to keep that fire bottle from beating the Holy crap out of you. You have already gone on the safe side as far as the cage, but I sure would like to see you put a heavier strap on those bottles! p.s. I have been accused of overbuilding by many, but it gives me peace of mind when I leave the line. Good Luck........