Go to the Crimea, the village of Radiant. There you are.
1) You'll see all this technique live, well, at least in metal.
2) Ask the owner of the collection why the presented Jupiter 5 glove compartment from Jupiter 4.
And so casually I can assume: all this was mined in many moments in parts, that is, really parts, when some parts of the unit were mined in some places, some in others, which in third, well, and then collected in one piece, in places from what was. (or then it is better to put a glove compartment at all?) And then, suddenly, I don't know, it's not even a piece of dead metal, but brought to a state: you can start and ride, and then the presence of at least something is a necessity.