Haha!
This project is turning out more fruitful than I ever expected. Now I just have to hunt down some steel/aluminium pipes and start on the skeleton of the machine. The RepRap videos and pictures gave some nice ideas on how to solve the actual construction and assembly.
More ideas? Im gathering all information I can get. Hmm...maybe I want to have some lidlifting device(for getting into the plates). Grippers or vaccum? More searching to do...
Its great that you could do all this with just the Arduino as controller (I like the small thing more an more...).
Now Im of to plunder kids stuff of servomotors...Hmm... that remote controlled dinosaur looks promising...hehe...