While waiting to be old enough in 1969 to drive the Leyland Comet I’d bought, I worked in the wood for my Uncle, a timber merchant in the Scottish Borders.
He had an ex army Bedford with a jib on the back to load and pull trees from the wood. I drove it at every opportunity.
In 1970, he bought a Madator with a hydraulic crane with the grab on it. By then I had my truck, but you know how it was, you just had to drive any piece of machinery!
Can’t remember what engine was in it, but it drove me mad. With one of those cranes, all you want is a constant speed form the engine to load the timber. It didn’t matter how still you held the throttle, it would suddenly start revving its balls off. Then you’d ease it back 1/10th of an inch and the revs would die completely!
Never did get the hang of the perfect throttle position.