We have tested a CF X - 6. We think we'd sell a zillion of them, if it worked. It didn't, which is why we don't have them available. Several Team drivers have tried them, and every one has gone back to the molded chassis. The "plastic" one does flex a bit more than the "graphite" one, and that can help on some tracks, especially in U.K. It seems that often -- not always -- graphite is better on dirt and plastic is better on astro.
As to aluminum, we don't like that either. Aluminum bends. And when the bend is not large, you don't see it, but the car is tweaked. You can 't bend it back. Once bent, it's toast. Very expensive. Heavy too.
So why CF chassis on the SCX - 60CF and X - 7? They have been designed for it, and they work. The 6 & 6 Squared were designed to be virtually zero flex cars, so that's the way they work.
You certainly can go for it -- we always encourage the Family to try new stuff -- but our experience so far shows you'll be no faster, and quite possibly slower.
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