I've added a laser/light combo to my HD pistol. The laser sits two and a half inches below the barrel. I can zero the laser for any distance I want, but of course I don't know ahead of time which is the correct distance. I worked out that if I zero at 15 feet, I'll shoot one inch high at 10 feet, one inch low at 20 feet. I can try to compensate if I can guess the distance, or if I've already measured all of the scenarios in my house. What I'm inclined to do is to leave the laser aligned parallel to the barrel, so that I'm shooting 2.5 inches high all the time (drop will be less than a half inch at all distances possible within my house). Now the trick is to be able to reliably aim 2.5 inches low. Not too hard when aiming for center of mass, but for some shots, the laser spot may not even be on the target, and I'd have to switch to iron sights. Comments? How have other people adjusted their lasers?