The AEM UEGO gauge has colored dots that light up to show rich, stoicometric and lean ratio of fuel to air ratio. The number in the middle is the actual air fuel ration. I think 14.7 has been bandied about as ideal.
The goal is to avoid "Leaning" out. I read somewhere are comparison of lighted bars to numbers, which is not needed with a digital display. Hope this helps.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.