[billbo911]

With the help of a student with much better eyesight than I, we were able to swap the two resistors on the end board in the set. We verified that the resistors were properly aligned and soldered with a "dissection microscope" from the science lab. Man what a difference that thing made in being able to see what we had done.
I am hoping provide feedback on how well the circuit works now. Hopefully I can provide this information by tomorrow evening.

By the way, here is a hint or two that can really help make the swap go easier.
The gear tooth sensor it's self is magnetized. When you get the resistors loose, they may get stuck on it. The hardest thing to do is re-solder R4. It is right next to the sensor. You will not be able to place the resistor on the board without holding it in place. I was able to make a very small wood chip into a holder, a toothpick would work well. Just put a notch in the tip and press it onto the resistor. That way you can hold the resistor in place with one hand, hold the solder in an other and the soldering iron in your third hand. Yes, it takes two people.

Good luck!!