Finally got mine set up thanks to some good advice from old and grumpy. Using a vortex viper with #5 plate and B screws and blue loctite. Snugged the locking screws until I had a bind on the windage and elevation screws. Centered the dot in the viewing area and tested it with my laserlyte system at 10 yards. No problem hitting center every time. Co-witness is perfect. Can't wait to get to the range. Found a revolution paddle holster that supports the rig nice and snug with a clean draw.