CC:
alexlockout
So, research led me to this, which means Yuki wasn't far off.
View attachment 1316045
But he had two trailing control arms (represented by AC wishbones), and nothing to act as a strut, like in the real car.
For his 2800 CS, Velo, as you'd expect, did his homework much better, and provided a much better idea of what the setup should look like. The cars are very similar in dimensions, so I kept the wishbone and hub mounting points the same, but used the (much) softer road car spring rates and damping.
I also moved the connecting point of the front strut and the front lower wishbone, because -9.5 degrees of castor is excessive, even for a road-going luxury-ish Bimmer. Now -5.9 which is still slow but feels OK.
Lastly, I took 25mm out of that nose-in-the-air stance. You'll need to: CM Showroom, Align using data, and Update Model, if you're concerned about the previews looking correct.
Feedback would be appreciated, and if it's good, I can try to reach Yuki to pass the suggestions back up the line.
Just remove the .txt, make a backup of the original data.acd, and drop it in.