CSC is a Carbon and Glass Fibre compound. It's basically what Schumacher call S1... The S1 version of the CATII and the Cougar both use something similar.
Depending on the thickness Glass fibre sheet is laced into a Carbon Fibre weave produce something that looks like carbon Fibre with many of it's properties but it's a bit heavier and has a tiny bit of flex in it.
To do set up and mill a full chassis plate out of 3mm CSC would be about £25-30. I'd have to adjust that depending on how much prep work is needed on the artwork and of course the size of the chassis. But that's still about a two thirds of the price for a Carbon Fibre one
Ideal Format would be Serif .dpp or Adobe .ai. Might be able to import .dwg also. The software for the mill uses vector based designs as it's file source.
No promise that I'd be able to do anything right from provided artwork.
we've never tried anything that big to be honest haha..bit scary
J