I was playing this and am at the point where I have 9 oil things and 2 engineers. One is researching, one is buying oil. I just saw and stopped my hand from turning the crank and thought this really should be a hidden free engineer. Stop cranking and click on auto buy of something else like an engineer, but it's you and you can stop with the stupid pointless crank and do something useful. Just a thought, but I like this game it's very addictive.