I haven’t tried any of the older vehicles but I’d say you’d be correct in thinking that they may have more than 900 dor. I’ll give 1080 a try.
Regarding volume, I did test that out by altering the setting up and down while I was in the middle of long radius corners and you can definitely feel that it has a big impact on the feel. As you say, it isn’t just a simple “more or less” dial.
I found going to one side of 50 gave me more strength on the straights and weaker in the corners.
Going to the other side of 50 had the opposite effect. Less strength on the straights and stronger through the corners.
Thanks again for the guidance