About this 3D model

I wanted to create a single STL that when printed (in reasonable time) will test the common calibration areas / failure modes simultaneously, namely:Single wall thickness (As SpaceXULA says, http://www.thingiverse.com/thing:1637 is perfect - thanks Dmatsumoto!)Wall and top surface finishOverhangs of various degreeSmall holesTowersExtruder start/stop settingsUpdated with initial print using Makerbot Cupcake defaults. The steep overhang fared better than expected, the short pieces of single-thickness wall failed, as did the tower. More pics once I've dialled in the Skeinforge settings a bit.