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  1. Hey everybody, I'm back from the dead (not like anybody really knows me). I made this thread months ago: Then I had to put my legos in storage for a few months while my wife and I sorted out a move (and I sorted out a new job) Legos are back out now and I'm working on my crane again. I'm completely overhauling the steering setup I had before - it was just a bad design. I realized just how much space is necessary in the main body of a crane and the suspension arms were taking up way too much room. The new wheel hub I'm working on (ditching portal axles) should free up 2-3 studs on either side of the center line giving me far more room to put features in. I was about to give up on the idea of multiple speeds, but that would just be lame heh. My question to the lego community is if anybody has any resources on the steering / suspension geometry of real multi-wheel cranes (let's say 10 wheels and up). I know that I CAN include features such as kingpin axis inclination, appropriate castor, akerman geometry etc, but I'm not really sure how necessary those features are on a lifesize crane, much less a lego version. So even though I've looked at tons of .pdfs from Liebherr and Manitowoc mobile cranes, I have not yet found a resource that really breaks down the exact wheel alignments. Does anybody happen to know how these companies set up the wheels on their cranes? I know most of them use pendicular axles, but I don't want to do this on my lego version (for a number of reasons).