In all the years I have shot shotguns I usually ignore the beads on the gun. I found that "most" people that stack the beads and use colored beads..especially the fluorescent beads seem to pay more attention to the beads than the target. I actually shot with a fellow back east that used the brightest bead sights. He seemed to shoot ok some days and poorly others. Every time he shot a gun with a regular white front sight he seemed to shoot better. He was one of those guys that figured that last 10% would come with more equipment. His K-80 broke one day at a skeet shoot. Since mine fit him ok he used it in the 28 ga. Went out and shot his first 100 straight. He couldn't figure out why he could shoot my gun and didn't seem to shoot his as well. He tricked his out with those fluorescent beads and his scores seemed to start dropping. Usually I tried to discourage their use with my students. Just seem to be another distraction to the average person. They were a nice way to make a profit when I had the gun shop...but I still tried to discourage the people that wanted to buy them.
Heck I won the 20 ga Md state Skeet Championship with the front bead on my gun cocked sideways. Never noticed it till I was about done. Name of the game is SEE THE BIRD...not the front sight