Update on my original start-topic in this Thread:
I had both front drive-shafts replaced yesterday. Car has a little over 24000km on it since January and it was not worth changing them until now because they would simply mount the old, flawed design which shudders just the same. Waste of time and effort.
Until now !
Tesla just released a re-designed shaft. It comes from another manufacturer the SC tech-boss* told me.
Drove a couple of hundred miles since yesterday, occasionally giving the car the beans to an extent I never dared before (because I felt the car would shake itself apart). Smooth as butter!
Conclusion: RAVEN MX SHUDDER PROBLEM SOLVED.
I'm really happy with the result. The new version of the shaft seem to work very well so far. Standard, High, Low, does not matter. All smooth. No vibrations what so ever.
Of course, I can't tell if they will hold up in the long run. But they re-designed the shafts (Raven X already has the re-designed clevis-mount that fixes the issue on pre-Raven X cars) so only time and lots of miles will tell.
So, folks with affected Raven MX's, start making those appointments and make sure to ask for the new version (to avoid them grabbing the old version of the shelf...)
*Chief Technician of the Tesla Service Center in Cham, Switzerland.