I used needle nose pliers (with rubber tubing to protect the metal) to hold the rod and then used a micro screw driver to act as a lever to twist that puppy off. I thought you meant the actual ball link.

Also, check out this http://www.rocketcityracing.com/ for some nice screw adjustable trim tabs. It took forever to find, but I finally did. Just ordered the 1.5"x1"x5/8" ones (ON THE SECOND PAGE of the trim tabs). I don't want to wait until the ones come in from Offshore.