We took our time going over it, the arm nuts were just loose. My guess is perhaps the alignment guys did it since I know for a fact the knocking was not there on my way home from his shop that evening. The alignment was done a couple days later right before our trip. So far the noise has gone away and the steering is great. He even offered to take apart the control arm in the future if it persists and check it over. I gotta say this guy is straight shooter he wouldn't take any more money from me just for his time (about an hour maybe 1.5).