Finally, a video of some sort. Albeit just one to show the drive-train.
I was worried that the freewheel had seized, but thankfully it was just in need of some chain lube.
I have a handful of things to do next.
1. Move bolt-holes on battery rack 1/2-inch back to allow space for larger front sprocket.
2. Attach motor relays to motor-mount plate.
3. Make bracket, then wire in switch to control motor relays.
4. Make storage box.