Bought new blades for my lawn tractor. After taking the deck off and securing the blades from moving (counter/clockwise). I tried several times to loosen the blades using a socket set but, I guess between the bolt corners having somewhat less than perfect edges and the fact that I kept slipping off the bolt I decided to bring the deck into my dealer and have them try to loosen the bolts before I end up destroying the bolts. Even the WD40 didn't help. How do you guys avoid this from happening to you?