Well, now that I think about it--just take a crescent wrench on both jam nuts simultaneously (both will want to rotate the arm the same direction) and give em hell. That will ensure that both are tight AND will ensure that both joints are concentric. Then just rotate the arm back to neutral and you're good to go. I guess the only problem is adjusting the arms. When I installed a set of these for a buddy, I used a jack under the pinion to set the axle where I wanted it and just had one end of the arms bolted up (frame end) with the other end resting inside the bracket. I rotated one so that I could just slip the bolt through and then did the same with the other one. Before you do that, you want the rig at ride height, the axle centered, and the axle square (using the lowers).