Well Halekai...as usual, you present a very convincing case based on experience. I've had good luck re-bedding MT genny tracks with the 2-step method...perhaps due to overkill on the 4200...perhaps luck...
Will give your way a shot the next time around...but I don't recall concavity on the bottom of my track so will have to check that first as it seems critical.
No longer posting. Reach me by PM!