Arrab,
tried to follow your thinking but a few phrases threw me off, by 'yellow fuel captions', do you mean amber low cautions? and by 'red fuel low caption', do you mean Red Fuel warning? This important, they are totally seperate systems, one cautions the pilot, the other warns with a gong. I say again, please re-read the previous excellent descriptions of the fuel system and then prepare a scenario. Also what is a reflow caption?