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This is the coolest thing yet all tho uou could make the landing sistem a lil better
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Well you would have to change it but you could try to make it like an elevator. Give it a contra weight. This way going up is no problem, but …
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You could use tires so it would stop it with friction. If u really think about it you could use two magnets to hover it so it would stop.
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maybe late... but you could look at the brake system of the lego haunted house...
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instead of taking the bump at the end, try adding some brakes little higher, so they slow it down before the final stop
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