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A simple k'nex marble machine. I built the lift before building any of the frame, so it doesn't quite fit. The lift is based on the wooden one ...
K'nex Marble Machineby Oceanous
K'nex Ball Machine Lift: Giant Ball Catapultby Mechanical Master
K'nex Marble Machine Elements Official Guideby collinjo12
k'nex marble machine 2013by www139
Project Lifts Knex Ball Machineby Oceanous
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