This feels like a dumb question, but with this motor, (not running, just in your hand), the motor has an awful lot of magnetic cogging. Is this right? When it is in my 4x4 slash, there is very little coasting. Its not like its coming to a skidding halt, but its not like any of the other Castle motors I have. Runs like a bat out of hell, but this just seems really weird to me.