Be advised, Per Ray, at Seyco, you must be aware, you adjust that bolt too tight, You can wear a groove into the metal that the bearing on the end of that bolt rides on. That groove gets too deep in that metal, and that bolt/bearning will not work any more, the metal is part of the saw metal that covers the saw. Not a replaceable part on it's own. He warned me not to adjust it any tighter than necessary to raise the arm and it stay in place. I would fear that you have added weight on that upper arm of your saw with the lights, so it could mean you have to tighten that screw beyond what is required... Just putting it out there, He told me that when I had an Excalibur which was several years ago. Maybe they have changed how that all works, but I would check it our first.