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this is a knex ball machine element as the ball passes the archimedes screw turns
make these connect the green rods to the yellow/gray connectors
you cant make this higher because its not very sturdy if you want to make it higher try to make the archimedes screw sturdy
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K'nex Ball Machine Lift: Giant Ball Catapultby Mechanical Master
knex ballby nattay
knex food holderby nattay
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