Lack of rear traction is the biggest issue with inline batteries in both 1/12th and 1/10th. Once you get the rear end biting good, the car seems to push. Softening the setup on a car with this layout seems to help alot. It is difficult to get any weight rearward and there is minimal weight transfer for and aft. This is one of the reasons i recomended adding weight in the furthest rearward position.
