Pstallo, I have an '84 M491 3.6 mongrel that I'd like to make progress on. I put a mere 500 miles on the '87 last year, and that is something I cannot abide...not after the amount of chiding I've given other owners for not driving their classics. The '87 is too original for me to mess with in the way that I want, and it's a bit too clean to drive dailyish...I hope to get the '84 to a good state in its place, but without the guilt that comes with modification or the fear that comes with original paint.
https://www.youtube.com/watch?v=U0s0czlJ4xA&t=38s