For those of you who speak German. There was a great episode of Alternativlos where they talk about details of the Wendelstein 7-X Projekt with some of the guys involved with it.
One of the most interesting parts of that episode was how the described their relationship with the hardware manufacturers. The deep level of co-working on a very hard task and jointly developing the tech needed was really inspiring.
[1] http://omegataupodcast.net/312-the-wendelstein-7-x-fusion-ex...
Also, something older from the middle of 2014, again in german:
[2] https://resonator-podcast.de/2014/res032-der-wendelstein-7-x...