This model is a prototype, i havent printed it so you can try to see if it works๐ .
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Print two of the cylinders, four stoppers and four wheels.
Take the wheels and stick them though the cylinders, after that use super glue or a hot glue gun to stick the stoppers on the end of each cilynder.
I know i havent made the rest of it, this is just a prototype. And remember to size it up because i probably havent sized it correctly ๐ .
The author marked this model as their own original creation.