I have an Otari 4 track. I've noticed that when fast rewinding, I can hear that "squiggly sound" - which in my mind, means the head is in contact with the tape when rewinding. This, in turn, also means more wear on the heads. My question is - is this normal? I would think that something would lift the tape away from the heads when fast rewinding. For a while, every time I did a fast, long rewind, I would pull down on some bars that are located on either side of the heads which moves the tape away from the heads. I guess Im wondering why these bars don't automatically engage when fast rewinding.