Open source 3d Printer using Sketchup

[sherwood11]

As a never ending tech geek .. I found this 3d printer
article at Thingiverse with downloadable SU files.
http://www.thingiverse.com/thing:28915

For some reason the downloaded files did not have
a .skp extension. After downloading, I just added
(via rename) the .skp extension at the end.

It may be off subject, but I found it very cool ...