Necessity is the mother of invention. This takes me back to my youth on my uncles farm. All the inventions in their little shop (I remember a power hacksaw, in particular). My cousins grew to become brilliant mechanics. Larry rebuilt a transmission from the John Deere tractor in the farmyard. It was technically a very sophisticated machine. I remember floating pistons, 12 of them, I think. And though I am fairly mechanically inclined there was no way I could understand how it worked. Larry's brother went on to be an airline mechanic for Air Canada. They had an old (1952?) IH 2 ton truck that they converted into a water tanker for fertilizer/herbicide use. Very under powered with a flat-head six so they bought an old Ford sedan with a 390 auto. They stuffed that engine into the truck and mated it to the 2-speed rear axle. The job took them less than 24 hours. They are still kiinda heroes to me.