It looks somewhat rediculous, but this little fella's the result of over a month's work, trying to come up with a simple, easily constructed, completely water tight and low resistance sealed couple for the system.
It actually works very well. Not sure how it would hold up in a higher torque/rev situation, but for this application it's perfect.

The rest of the setup is the basic frame and gearing for the device: Worm drive - down gear - universal. The last being just a section of washing machine hose, which being light, easily sourced and only flexible along it's length (while very resistant to twisting) is again, perfect.

Click and drag ^^

This panorama is not quite as good quality as the first two, being snapped quickly while I was leaving Kesselberg.

Arrived in Berlin, walked past massive squatted space with iron sculptures on way to place to stay. Back next day talked to crazy painter, directed me down the road to a squat in the university grounds. There Lilly gave me lunch and told about squat around the corner from where I'm staying. Gone now to offer help make free food and attend some kind of gig. Heard of community just out of town where people make things. Heading out early tomorrow and hoping for the best.

I really think there's something wrong with me.
My relationship to reality is that of a deranged toddler constantly followed around by a long suffering nanny, cleaning up messes and trying to keep me out of traffic.
Reality says; Daniel you can't just show up in an unknown city, in some strange country, and expect everyone to just happily give you everything you need-
by which time I'm already joyfully wandering into the nearest bus lane.
My audacity of expectation, if only in retrospect, shocks even myself.

Things I got in Copenhagen for free:

Three days staying with a very nice couchsurfing.com couple called Marlies and Kristen.

Free reign of workshop space at Christiania for six weeks.
I turned up at Christiania unannounced, went into the first cafe I saw and asked to talk to someone who lives there. They pointed me towards the main office, which was closed for the weekend but dude there said if it was regarding solar, talk to Alfred. Alfred was all like, sure, come back tomorrow and here's a key to the workshop, indicating a corner; 'you can stay here'.
I thought it was a bit weird to offer a workshop floor to sleep on, but a nice offer nonetheless. Next morning when Alfred comes in at 8am to find me asleep under the bench it turned out he meant 'stay' as in, stay to work.
That was a bit uncomfortable.

But then after some emergency Couchsurfing request sending, facing the prospect of having to pitch tent in a very dodgy looking but nearby park, ended up four days with another CSer called Rikke who not only gave up her entire room for me (with computer) but then managed to get me my room on the Illutron barge, where she's resident.
Then she gave me a bike.

The barge, populated by mad and gifted artists, had another workshop and my room a computer.

Almost all my building materials were pulled out of Christiania's various skips and recycling facilities.

There's a vegetarian restaurant near the workshop which gives you any unsold food if you help clean up. Between this and a nearby supermarket with a pretty good dumpster I got all my food for free.
Plus had the amusement of watching them debate exactly how much work they could ask before feeling they were exploiting me. I don't speak Danish at all, but sentiments such as 'don't be crazy, you can't make him wash the floor!' and 'course we can, look how much food we're giving him!' tend to transcend language.
It was really good food.


Things in Copenhagen that I paid for:

Staying on the barge came to about €7 a day for bills and stuff.

Some of my materials, if I couldn't scrap them.

The occasional falafel.

_Finally_ managed to come up with a sealing option that should work. I went through a couple, some of which actually kind of worked ok, but this one's the winner.

Completely sealed, very low resistance. Just a previs at the moment, I'll get some video of it working when I can.