Having problems with re-belting this one. All the belts were goo when i opened it and i have no clue where to put the belts... there are 2 large pulleys side by side and a small pulley on the motor.... is there another pulley i'm missing? 1 belt for all 3 (this doesn't seem likely to me)? This unit has 2 pinch rollers and is designed to play the tape in forward and reverse....