Good tip on the Orion motor. I see Tamiya just came out with an upgraded SS motor which is supposed to be better than the original sport tuned. I may try this new one first because it's only 12 bucks compared to the Orion. But you need to use aluminum pinions with the newer Tamiya motor I see.
http://www.tamiyausa.com/product/ite...oduct-id=40537