This model is a prototype, i havent printed it so you can try to see if it works😅.

𝘽𝙐𝙇𝘿𝙄𝙉𝙂:

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 😅.