Sir, I agree with your descriptions and differences but only to a point. If on the other hand you live in a tent, in the bush and your machine is broke and your so-called mechanic pulls some hard hours in sub-zero/ + 30C with bugs to beat the band, bare hands, covered in jet-fuel, with only sat-phone service for support...AND wakes me up the next morning 1 hour early for run-ups...AND wants to be called an engineer....Well Sir I will indeed call him an Engineer. I have always referred to them as such and will continue to do so. That boy/girl has earned it...period.