I’ve made a few dimension changes to the crank mechanism I was working on. I reduced the length and height of the box so that the mechanism itself was more of a close fit to the box.
That done I’ve put together a final version and completed photography so I can release it as a kit. I just have the instructions to do.

I’ve put together this House Maid model as a demonstration of how the mechanism could be used.

Here’s the animated version on Instagram