Originally Posted by or8ital
Tungsten is superior to lead in every way except cost. Its heavier for the size and not as toxic.
Other than Tungsten is not as malleable as Lead. Tungsten is as hard as steel, so the little Tungsten bits are better off as small instead of large.
As for needing to offset the battery, what type of car are we dealing with? What type of LiPo battery are you using?
Most LiPo installations I've seen have the Lead stick-on weights attached to the outer edge of the LiPo battery, not the Top or Front/Back edges. This allows less weight to counter balance the chassis.