Wow, thank you for doing this research, and contributing to a solution to this plague affecting these trucks.
If I may make a suggestion, once you have your final wiring done, maybe you post a step-by-step procedure of everything you did. Because as it is now, its a bit confusing to read with your research and fix are written together. Again just a suggestion, and thank you for your work. Yours and Mike's work may actually lead to a permanent solution to this problem.
As a side note, have you looked into the fix some people do, by running a new ground from the alternator to the battery or body? Could that be coupled with your re-grounding?