Nice review Gary. Thorough and complete. I would not apologize to Lionel for the couplers though. They need to get that right in the future. Unfortunately I imagine even if a change is made now it will take time to work through the system.
Let's pull a positive out of this review and push Lionel to go back to the same truck design before the thumb tacks came back. IMO those, which are on the old cars, had one of the most robust coupler made.