Update I have figured out the spacing on the teeth so it is consistent between the two different size wheels. One of the smaller wheels also has a stub on it now to mount it to a shock of some kind. Working on some tank tracks for a future build that I am planning These are merely a concept, I need to do a little more research on the teeth per inch when moving from the main drive wheel to an idler wheel. Any input would be great... I am working on the suspension system now. Will update when finished.I probably wouldn't waste the fillament printing these yet because I don't think a track will mesh between the larger and smaller wheels at this point.