Made a bunch of improvements to where I actually use it to print kid toys.
The printing starts slow to help the first layer stick; it speeds up later in the video. I had to dub it over because the original audio recorded by the phone was too hard to understand.
Some other videos:
The Z mechanism...
This video by dizekat shows a new kind of kinematic system based on string. It should be possible to make very fast but cheap printers like this due to low inertia of the system. Very interesting!