A model to demonstrate and test a couple issues related to building models with the Makerbot Replicator: (1) making a sphere violates the 45 degree rule - how poorly formed is it on the bottom? (2) at 1% fill on the sphere, is skeinforge smart enough to save most of its 1% fill for the top part where it's needed? (3) with the mortise and tenon being the exact same size in Tinkercad, will the printed model actually fit together tightly? (4) can we make our own raft instead of using the Replicator G raft support option1) It looks pretty good, actually! It's a small sphere so that helps. It's only slightly sloppy at the bottom. The facets on the sphere are legible near the top where the bottom surface is more like coiled rope. 2) For most of the model, there was almost no support inside (ie: it's hollow). The supports started showing up at the top of the sphere where they're needed (to support the cube hole) 3) The tenon was only slightly too big and needed a little bit of shaving with a knife. After that, the two pieces fit together very tightly and really would not require glue in our case 4) The raft worked fine and was easy to cut off. The model was designed so the top of the sphere was slightly flattened but the printed model is pretty spherical still.One unexpected detail is that the circular ring portion printed hollow. We used the default of 10% fill for that model and maybe that was too low to properly form the narrow part of the ring. Unexpected and a bug I would think.