Howdy all. I was hoping that someone who owns a Surefire X400 can help me answer a question. Have you been able to adjust the laser sight, and how? I am unable to adjust the windage on the laser to center. The range of adjustment appears to begin off to the left and only move further towards the left. This has been the case with the first unit I received in late July and a replacement unit I received in August. I have spoken with customer and technical support, and their advice has been that I need to adjust the screws together and not separately. Given the single supplied wrench, I am not sure how to accomplish this other than by small lockstep adjustments, which has not corrected the problem. I would appreciate knowing if you have had any trouble. I'd just like to know whether I should exchange a second time. Thanks, Matt.