You are absolutely right, J. Hall. When you have someone mount their gun and point it right toward your eye, if it is a hunting gun, then the beads will be lined up, one behind the other and they should not see the top of the rib. Their eye will be on the same plane as the rib. So how do these guys think you will be looking down on the rib. If someone mounts a trap gun, stacks the beads on top of each other and points it at your eye, then they will be looking DOWN on the rib and see down the whole length of the rib. It's as simple as that. If one gets the process backwards, and mounts a field gun like a trap gun, then you will have to compute two angles when following a bird- how low to hold the gun under the bird AND how far to lead it. Not too many people do that. If they do, that's OK but that's not the proper way to do it and I would certainly never teach a beginner to use a field gun like that.