Didn't mean to offend by leaving the ignition module connected, but I always picture myself on the side of the road without help in the ozarks. I usually leave myself a backdoor to reverting these things back so I can make it home in case of emergency....such as keeping the original plug wires and coil in the trunk.

The resistor trick is commonly used to null out offset voltage in oscilloscopes and such. Ancient chinese secret. heh.
We may have to get you an oscilloscope for your birthday. You are far too skilled to be working without one. Keeps the frustration and guesswork down, for sure.