That's why I went with the Durango DNX408. Engineering wise it has some interesting changes to the conventional designs. Both servos are laid down instead of standing up as in most designs. The engine is closer to the center of the chassis than the typical design. The engine is also placed so that the center diff can be in the center of the car. This allows the front and rear drive shafts to be the same length so you get the same amount of twist under hard acceleration. The diffs are designed to be removed without having to take the whole suspension apart. The tank's lid is off-set from the tank so that it can be centered in the chassis. Is it revolutionary? No...but it is nicely engineered. Yes there have been some issues as with any buggy...but that doesn't change how nicely engineered it is.