I used this for 2 things:
1. Balancing my chassis left to right, becouse i now use LiPo batteries the chassis was much heavier on the right side (the electronics side). I fitted 5 of the 5g bits left to the battery, which was just enough to balance it out.
2. Making the front of my chassis heavier. As a drifter i experienced a lot of understeer with my TB Evo 5, so i added the remaining 95g to the front bumper, which made my car have a lot less understeer! :D