Isn't the TC3 already one of the quickest out of the gate!?!
I guess you could get the composite CVD's and lightened outdrives if you don't already have them.
Maybe an aluminum shaft? I would think most of the rotating mass is in the wheels/tires/inserts.
Maybe an aluminum spur carrier thingy?
I ran the locked diff this weekend for the first time on asphault. Awesome out of the corners.
I ran it with the center one way (forgot to bring the diff) and it ran awesome. I think the locked diff helps with acceleration. Coule easily shoot past the Missions and Losi's in the corners!
I ran the Juho guys Euro Champ setup for med grip bumpy asphault. Found at http://home.swipnet.se/airwide/
Awesome! I was a little concerned with the odd droop settings, but it worked.