ok. well i figured it is a good package, adn is gonna save me money in the llong run rather then upgrading a TT-01 chassis, just to get it to the specs of the D version. ill invest in the TT-01D and upgrde to the aluminum shaft before i run it, then................ill be set for a while. with the standard sport motor included in the kit, can you dissasemble it to replace the brushes? or is it a throw aaway kinda thing when they get worn.