I got the first parts and the first plastic pieces are in the 3d printer.
It feels good to have some personal project to work on. :)
I hope to have a first basic rig tomorrow.
..as long as the printer keeps up.
For it may be that it is miscalibrated and holes are shrinking too much while cooling down.
(deadly for things made to measure)
Update: I disabled the Skeinforge Strech-plugin and holes are fine now.