RoboMaster S1 - DIY

## Updates
- *_2019.07.18_* Printed, and it works spectacularly! I've got one fully compatible spare wheel. The 'wheel hub' is the only hard part to print (lots of overhangs no matter how you do it) so I've added designed-in supports. Refined the other designs a fair bit too. This thing is so cool. So satisfying to have every roller click perfectly into place on the _first prototype print_.
- *_2018.07.19_* Heavily updated the hub to print 180º flipped from before. Allows for some needed geometry that was missing before. Prints great!
* I've now switched to printing with a *0.6mm nozzle* for a large improvement in print speed and strength. As a side effect the added-in supports become small to slice/print since I'd designed them for single-width 0.4mm nozzles. If you want to use anything but a 0.4mm nozzle you'll need to edit the 'printable' tab in the OnShape, I made a _variable_ just for such things.

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The new Robomaster S1 is out, and it's a pretty freaking incredib