That all does sound like binding gear boxes/box. The KV is not a great turner on any surface, and will have more trouble on tall or even medium hight grass.<div> I don't beleive the real KV was able to do a neutral turn in the first place. i know that doesn't really mean anything in the hobby , but for realism sake it is something to consider.</div><div>The tracks are wide and the hull is long. These factors all have an effect on the vehicles performance. Each type of tank will not have the exact drive characteristics as every other type/model.</div><div>As the Sgt. says, I would check everything out before you smoke a board. It is VERY common to have a  gear box /gear boxes to be a little sticky or bound when they are new.</div><div> It did make for an interesting question in the beginning of the post. Some very clever answers. LOL.</div>