I wanted to create a single STL that when printed (in reasonable time) will test the common calibration areas / failure modes simultaneously, namely:Updated 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.Print on your 3D printer of choice. Measure, tweak Skeinforge settings, lather, rinse, repeat as necessary!