Hi. I didn't know that Tanc had a road.
I took a couple of my cars (Fulvia S1 HF, 037, Land Rover 109, Triumph TR3a) to one close by (I think Tanc has used it):
https://www.youtube.com/watch?v=Tq7PIXQkb5s And this one was done in Holland while Vere had the other Fulvia:
https://www.youtube.com/watch?v=M2uxPvSfTsA I would just say that your car needs to be in good running condition before you take it - fresh oil, inlet and exhaust all good with no leaks - that kind of thing. The tuner will either just be testing it and giving you results - or they may be trying to improve the air/fuel ratio, timing etc. depending on what they've been asked to do of course. Watching it is always an experience - it's easier on the nerves to watch someone else's car being worked on. Good luck.