Mad Rat: trying to make shells

[iamdigger]

Has anyone tried to make their own shell for a mad rat or other rc?

I laser cut a mould out and glued and sanded it to roughly the right shape, just need to finish the mould off and then going to try to vacuum form it tomorrow. I'll post a pic later. Anyone know what plastic the shells are made from? I'm going to try HIPS for now, just to test it.