I've always been a tinkerer at heart so I wanted to see if I could make my own. I had most of the stuff lying around and only had to buy a few things. Mainly the skewer mount. After thinking about what I wanted for a bit I put it together and this is what I ended up with. I wrapped it with orange tape for visibility.
It rides nice. Really can't even tell the bike is back there. Only strange part is getting off and on the bike as the balance is a bit off. Overall I'm pleased with it though.