I have a Ridgid 7500. It cam with 100' of 3/4" cable witch I never could get to feed out of the machine very well. I finally decided to change it out and went to a 5/8" cable which would fly through the machine, no problem. I have, one year later, decided to go back to the 3/4" cable to handle roots better. I bought a brand new ridgid cable, and low and behold the same stinking problem. The cable will not feed properly. Infact sometimes I have to pull or push the cable bak in or out to get it to move. Sometimes the cable just completely stops and will not go any further out reguardless of what I do. Help!!!!!!!