Why ? Because we ran the demo class. I love mine. I took 3rd in J82 Demo at 08 Nationals, and it is a proud moment. The wing makes it more planted then the T-4 donor was origianally. So on 1/8 scale tracks you can put down mod power and send those big gaps, better than a truck with a spoiler, that is in the "draft".
This class would be more successful if a J82 conversion for the Losi trucks was devised. The Losi's already have a more inward-offset rear wheel so shorter arms/dogbones would probably be in order but If the guys with Losi trucks could convert then you'd have many more participants. I would have done one but wasn't willing to sell my XXXT and buy a T4 to do this.
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"I have no idea what you're talking about, so here's a bunny with a pancake on it's head."