Seems like this is years too late but you can remove head easily. After you unsnap the auto feed part and remove the spool you will see a blue cup. Depress blue cup all the way down and spin counter clock wise. This is for the model I purchased today in year 2014. If the cable spins or you need to retigten the bolt. Take the bootm section off and but a socket wrench on the cable and you can tighted very easy