BigJim - If it helps, I just picked mine up, and the wiring is like this:
Each battery is an independent unit controlling either the engine motor OR the landing gear motor. From inside the plane, bring the red wire to the contact on the front of the base for the engine. The blue wire goes to the black button piece at the rear of the base. Another wire (mine provided was black) goes from the rearward battery contact to the plate directly underneath the button. Make sure you strip the wires when wrapping the leads around the button and the piece below it, and wrap it a couple of times if you like. That's essentially the break in the circuit, and when you hold the button down, it completes it, making the motor spin the prop.
For the landing gear, it's much the same, except the red wire comes from the motor at the top of the base. Connect it to the front contact, and connect the blue wire to the button, etc.
If the prop spins the wrong way, just reverse the battery.
Hopefully that helps. Let me know if you'd like me to try to snap a picture (my wiring job is ugly, but it does work).
I'm amazed, given the engineering of the parts, that my bombs still drop and reset as they should.
-BD-