Im in the same boat as you Pmac. DW and the same feeling of DW that doesnt eventuate. Anything over 90-100 kph will guarantee DW. Slowing to 70-80kph cures the DW but in traffic this is an issue so I usually pull over and stop.
I have Teraflex upper and lower control arms and similar castor. Thinking about replacing the tie rod ends next.
When the lift was first installed no adjustable trackbar was available and stock CA were still on. It took nearly 12 months for the first DW to arrive though I had been expecting it for some time. Adjustable trackbar, new CAs and front end alignment didnt really change much after being installed
A strange thing happened recently that has got me thinking, though I dont know yet have an answer. I was driving my jeep (empty) on a rough road and got DW three times plus a few other twitches that felt like it was going to go full DW. The Jeep was being used to transport 4 bridesmaids for a friend. When travelling the same road again fully loaded, 5 people, full fuel tank, and car fridge there was none of the same feeling of iminent DW or outright DW.
Was the extra weight levelling out the steering geometry (track bar and steering arm) or was the weight restricting movement through the bushes on the tie rod ends. I am only saying tie rod ends because the CAs and the track bar have new bushes.