I just sold a Heym 375 H&H that had the forearm selector switch. It was really handy at the range as you could turn it off and not have to chase your empties although in all honesty I have the habit from shooting sporting clays of just putting my hand over the rear and stopping ejection. The Heym system does work very well and is totally unobtrusive. I do prefer ejectors over extractors although my Merkel 470 does not have them. The one Elephant I shot with it I was able to reload and get off 2 more shots to the hip area with no trouble. Which incidentally hit one on each SIDE of the hip joint. So much for breaking a hip and stopping him.