Tobbasco, I like your 944! One thing that caught my eye is no rear glass, do you not get lots of exhaust through the huge hole? Also, an FYI, we had a racer without a back window, at over 100mph the motor blew and the oil ignited which caused the fire to suck through the back hatch which is the only reason the driver was burned pretty bad, you might consider plexiglass. Sorry to bring it up, but I would feel like crap if something happened to you and I didn't.
I see that The Drivers Edge (not the teen driving school called Driver's Edge) has rented Circuit of The America's in January, before it sold out, can you say how much entry fee was? I was there for F1 and the track looks like a lot of fun, would love to drive it someday.
Thanks,