To get tension off the spool take the 3 screws out of the DC Module and remove it. To do that you need to unlock the side cover by sliding the lock in the opposite direction it is now which is locking the side cover on. The DC Module is located on the opposite side of the reel the tension knob , brake star and handle are on. That said I still suggest you take the handle and the drag star off so the 4 prongs on the tool will be able to seat properly to turn it.