Here's an update on the project:

Attaching the copper collector pipe.

In action.

Pumping out steam!

Attached hoses for water heating mode. Unfortunately the plastic connectors I used melted. (Like that was unforseeable!)  That drum you can see I have insulated and am using as a small storage tank (just make your shower rather quick!)

I'm toying with using a "Worm Drive" ie a big thread.   Not sure if it's going to work.   May end up using a cable instead. I'm thinking of using a windscreen wiper motor to drive it.

Mounted on stand to assist with pivoting.