Chart Two, Top Box - Incorrect/Erratic - Sounds like ME and some others. Sorry about "boite de thon" [pronounced "tone"] - You do very well in English, better than many who don't live in French Canada. I had to gOOgle to get that answer. I do not know much French although I took it in high school. Should have taken Spanish. Much more use for Spanish in modern day America. Particularly FL, NM, TX. I'll supply info about the canister I find. That common one is spherical 156-mm diameter plus mounting ears on one side.