Cotton Reel Tank / Tractor

After seeing this Beautiful everyday Ladybird things.
The cotton-reel tank/tractor (1966), I remembered making these as a kid, so here's my design for one.

Support is needed for the hooks on the top of the reel. Otherwise, it's a very simple print.

It's clear that, after working with this design for a couple of weeks, the candle-wax washer used in the traditional design serves as an important part of the mechanism. Without the wax washer the toy unwinds uncontrollably.