The trem arm on my EVH isn't as loose as I would like. Have loosened the small allen screw on the arm clamp and spread the black clip apart but the arm still doesn't swing freely. I looked under the trem cover and noticed an allen bolt that looks as though it goes into the trem arm. What does this do? And how can I fix my small annoying problem. Also want to say it is great to finally join the forum. Love those EB's, both EVH and Axis.