About this 3D model

Unable to remove the base using the OpenScad version of the 'hollow cube' (see ancestor) I went with what I knew and drew it out again in Sketchup. This is a 30mm cube with all hollow faces and 4mm square bars. As orionwnix said previously, it's great for many 3d printer tests including ooze/retraction, dimensional accuracy and squareness, and of course bridging! Short video of this cube being printed on my blog, specifically the challenging bridging stage: http://numbersixreprap.blogspot.ie/2012/09/bridging-gaps-video-clip-included.html