The Official Guide to K'NEX Ball Machine Elements by collinjo12
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Step 9: Archimedes Screw

This is a remake (made by HamenChips) to the Archimedes Screw from the Trampoline Tower (TT) that has instructions here. When the ball slides down the path, the blue thing(s) turn(s). I made my screw the size of the one on the TT.
 
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