Jim, you apparently know a lot more than I do about door openers, however, I find it curious that the adjustment is labeled "Down Force" on most openers, Not "reverse sensitivity" or something similar. This indicates to me that the idea is to regulate the force with which the door reverses. What it sounds like you are indicating is that this is NOT a safety feature, so what is the purpose? Is an opener without an electric eye no improvement over an older opener without ANY reverse? Why is it required? Obviously more expensive to produce for no reason other than recovering the cat's body which could be accomplished with another push of the button. IMO, a simple effective fix would be to require a switch that stops the door 1/2 way down requiring a second push of the button to fully close the door (in addition to the electric eye), but that is probably way too simple. One issue with the electric eye is that if the sun shines on it when the door is open, the door will not close. I have run into this a few times and it is fairly irritating to the homeowner.