I recently got a slightly earlier model of this. Couple of pointers. Besides the belt needing obvious replacement, check to make sure the capstan pinch roller linkage moves freely. After decades of storage the grease turns into glue more or less and won't allow the roller to move into the play position. Also, check the felt pads for the reel hub brakes, make sure they haven't come loose from the bands they are supposed to be attached to. If they have, you can just re-glue them into place. Finally, check the left side tape guide below the left reel to make sure it also moves freely. Same deal as the pinch roller, grease turns to glue over time.