What did you do to the seats and brakes. Also, I have the Vorsteiner hood and they said their CF bonnet doesn't really offer any weight savings over the stock hood. Both are already light. What brand do you have?I have taken 266 lbs off of the beast which has made a huge difference.
My list is as follows:-
Seats (92 lbs)
Headers and cat back exhaust:-(70)
Cf Bonnet (30)
Then there is the light weight battery like you have stated, cf trunk and roof. The next step would be going radical with plexi windows, rear seats removal, adding cf fenders, and replacing parts with those of titanium material.
Hope i helped :M5rev: