In case anyone's interested, I fired up the 200tdi tonight and it ran surprisingly well for a truck that's been sitting for 3 or whatever years, with diesel the same age. I've put more videos, including a video of that truck running, under various folders at
https://www.dropbox.com/sh/bfb3bq8l89ux7ig/AAAIDZ-7XPRMUBIS2HUKh_ula?dl=0. I noted in the video that I was feathering the clutch more than I'd expect, but remembered after that the truck has a flat tyre which likely contributed to that.
There are also detailed videos of the 300tdi and v8 trucks. I've tried to show the good and the bad on both of those vehicles in as much details as possible. I have them advertised locally at this point, finally.