I simply prefer no weights added at all, no matter the surface. I just put very little lead on the outside of the tunnel / inside of the saddle pack LiPos to get it legal.
Low weight also saves the belts, which are very narrow for todays performance (snap easily).
I do this with the std. Worlds setup (see manual). Plus Ellis' steering mod. And front diff, no one-way.
It drives amazingly!
