Hello, sorry for open another thread for fm towns marty issues I removed the marty drive to change your belt but unfortunately I changed the position of black wheel, I don't know what this change can do on marty drive, if it's bad or if there's no problem, when this black wheel moves and internal thing that looks like an internal wheel moves too. I think that this black wheel don't change the position of drive head because it still stoped when I move the black wheel, only an internal wheels moves take a look in this shot, this is the actual postion of my black wheel. If anyone can check the default position of this black wheel on your marty will be apreciated: http://i17.photobucket.com/albums/b95/arthurcollection/wheel.jpg Another question, there's any possibility to change drive belt (I don't changed mine yet) without open this green board? I tried to remove but can't without open aything