Maybe it's just lack of practice or my eyes, but I always have trouble getting a good sight picture with a ghost ring. Co-witnessing through a red-dot sight probably doesn't help in that there are more things in my field of view. If I squint and concentrate then I can get it, but that's not how you should have to do it. I'm tempted to take some bright neon-colored paint and outline the ring, but I'm not sure if this is a good idea or not. Has anyone tried it?