I use a Sen-Fa clone that needs a toothpick to hold the rear axle in. It was accidentally stepped on a while ago, so it is no great loss if it gets munched by the Dremel. I'm personally against the Dremel idea, but my brother wants to "spice things up" a little......

The most effective mod to the body is a little ramp mounted on the front to get under your opponents car and lift his rear wheels off the ground making it easier to push him off the table.