My 3D printer won't be up and running for at least a few weeks, but in the meantime I've been getting ready by designing some simple robot parts and tests. This particular part is intended to test the printer and aide in it's setup/calibration. It includes a number of different solids and shapes while being designed completely in 3D from the beginning. Of course there's no guarantee that it will print. In fact I will be very surprised if I don't have a lot of problems getting it printed initially. But, it will be a great learning experience and will help me debug my tool chain and printing process.