Very nice build. Looks like you're about a year ahead of me, as I'm just getting all the mechanicals in mine worked out and then road tested for a few months. Then I'm going to blow it apart for a complete frame off rebuild. Nice work.
What is the ultimate destination for your exhaust?
I see you've done exactly what I'm planning in order to run the pipes through the cross memebers, and I'm building a fuel cell that'll sit at the back of the chassis where the spare was so I have room to tuck the mufflers in tight, and run a full exhaust system all the way back. I'm also mounting my battery in the back under the bed.
Carbon Fiber isn't that expensive. You can get all kinds of good carbon, and the hybrids mentioned here, in small quantities from Advanced Vehicle Technologies in Indy. Joel Walsworth will fix you up! Much cheaper than places like Fiberglast...
As far as how it looks, well, that's up to the guy who lays it up. You can see some of my work in the "other vehicles" thread. There are a few guys out there who know what they're doing, still not many, and still yet many more crooks and charlitans selling one ply of carbon on a crap fiberglass laminate as "high tech". Buyer beware...