[lukevanoort]

As previously mentioned, you can do whatever you want. But, always keep a connection with reality, a custom solid carbon fiber frame may win awards, but is it worth the trouble. On a more likely note, that powder coated 80/20 extrusion or welded aluminum frame may be a bit stiffer, lighter, or cooler than the kit, but the kit one is very adaptable. Given, it definitely needs stiffening, but you can have a very capable chassis with the sole addition of a round or square aluminum extrusion X-brace and higher traction wheels.