Been doing a bit more testing, latest videos:

This is the video of the first ever test...
http://www.youtube.com/watch?v=ZrhZL..._order&list=UL

And here I tried machining some aluminum:

http://www.youtube.com/watch?v=b4NrS..._order&list=UL

Bit of a faliure! I think I'll try that again but with it mounted higher on the bed. I could see/hear the Z wobbling.