"I think we can put our differences behind us... for science... you monster."
http://www.shapeways.com/model/306115/portal_glados_ring.html?gid=ug
Turret Ring
STL (Stereolithography, filesize: 765 KB), OTHER (Other, filesize: 1.22 MB), SLDPRT (SolidWorks, filesize: 4.91 MB)