We do a lot of custom golf studio buildouts, and the JR3 has become our only choice for projector ceiling mounts. This projector mount has thumb-screw micrometer-style adjusters in all three axes that make adjustment quick, precise, and SOLID. It also has a quick-release slider to lets you easily remove the projector without disturbing the adjustments of the roll, pitch, and yaw. The JR3 makes it easy to get your projected image squared up with the screen, and then it STAYS THERE forever.