[Tom Line]

As long as the part is commericially available to teams for under the one item limit (I believe it's $400), there's no limit on the type of mechanical system you can purchase.

There is a white paper here under the media section that will explain how to couple your dewalts to anything you would want. The fisher-price section is VERY similar to how you would do, say, a 775 banebot, with only some slight modifications to the distance you need between the face of the motor and the pinion gear, and the placement of the holes to mount the motor. The name of that paper is "Nothing but Dewalts".