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Hi, this is my first project, a Drill rig B80, mounted on a 6 x 6 Cargo Truck (G-744) Lego version: has the foolowing features: 1 M motor for steering 1 L motor for driving and rig up/rig down mast 4 pneumatic cylinder like stabilizers I am really happy with my result, but I need some help with 2 issues, first I would like to move the rotary head over the mast, like the real one (cylinder and chain system) but do not know how to solve the space problem the figure with the rim has to go up and down over the mast and two I have problem to keep straight the cylinders, I have 2 new model so they spin around, and do not know how hold it this hose are third party the bend ratios is high and dont let me fit the plate :S I'll appreciate your advises and help