Thanks for the quick feedback.
I might have found a replacement optical slot sensor on Amazon. Ordering. Will know tomorrow 
But what will I do with the 18 that I don't need!
I discovered that the diode side was blown by accident ... I noticed that when I had the tray in place it would turn forever. If I removed it, the motor would not advance at all. If I put a piece of plastic between the diode and receiver it would run until I removed the plastic. Turns out that was happening because of ambient light. Then I noticed that if I pointed a flashlight into the slot area it would advance properly, one feeding slot at a time. I rigged a LED light strip so it would light when the motor engaged and when the slot in the tray (that is what that slot was for!) passed the slot in the M0C70P1 part it would stop (and the light would go out). I have two of these feeders that have the same problem ... guessing the diode burned out. One is working with my kludge (happy cat) and the other I am trying to fix a different way. Also hooking up to a 5V power supply to see if I can take batteries out of the maintenance.
Thanks again for your support.