Also… i’d love to see a model of that little fuel tanker… isn’t that the same cab (Ford C?) as Athearn already do? Maybe if enough of us send them the link and ask for the truck they will do it?
Nice guesses but you are both wrong in my opinion. Here in northern Illinois most of us live on the bed of prehistoric Lake Michigan which ran down to about Lafyette indiana at one time. As such we have a huge deposit of limestone and you will find many quarries in the Chicago area. Most of it is the low grade stuff suitable for fill and cement only. If you travel I-80 into Indiana you will cross one of the deepest open pit mines around in Thornton. I’d bet the farm it is a limestone used as fill.