RESOLVED Crazy Unexplainable Terrifying Haunting and mysterious DEATH WOBBLE Land Rover

Hi guys. This is part 7... or 8 maybe of the rather disorganized and chaotic full vehicle restoration project. I have done quite a few vehicle repairs, but this is the first time I have carried out so much work on a car. I was supposed to just get it road legal and just drive it about for a bit... but then I got a bit carried away, and before you know it you have gone beyond the point of no return.
I have had this terrible death wobble which had made my ride unusable ever since I have had it, or pretty much. I have only driven 3000Km in the 18 months that I have owned the car. I have done a lot of work on this Classic Range Rover. Land Rover build great cars and I have two of them, and in the family there are a few more. This one had been quite a project, and I totally underestimated how hard, expensive and complicated this project would be.