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Imagine that you are in 1975 and sudenly you have to build a vehicle with working rack and pinion steering... Remember, Lego Technic are not available yet: all you have are the old cog wheels and the Lego Expert wheels. The first problem is the rack: I solved that by using four links of the old chain. Each link has two studs on top of it, so a chain made of four links can be turned into a rack by attaching it to a two by four plate mounted up side down on top of two "Swiss cheese" bricks. The rest of the mechanism is pretty strait forward, although the absence of "plates with holes in them" makes the whole thing quite bulky. In order to try to hide this fact, I built a truck, rather than a car.
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