In case anyone wants to convert an stl file to a dxf (autocad compatible file)
here's what i just used: http://www.cadforum.cz/catalog_en/stl2dwg.asp

Imported into autocad and it was all there. My knowlege of autocad is limited at best. But as far as I can tell this works perfectly :-)

And a printing tip. If printing at low layer heights like 0.1 - 0.16 - double the height of the first layer.