Sick. I've spent a few years working on GT-R's in sims. Lots of measurements and countless hours scouring through documents and speaking to owners and whatnot for anecdote and data. You got yourself into a real rabbit hole now. Probably took me at least a few hundred man hours to sort out the electric systems.
After the R33 I'm involved with releases, I could share my ATTESA and HICAS simulation with you, if you want. They're really very realistic, and although it remains a mystery what *exactly* they did to the ATTESA in the Group A or N1 cars, it can be roughly worked out if you figure everything else out. The TAISAN STP R32 is one I've always wanted to make, given how much we know about the specs. Maybe, some day...
Sharing ATTESA and HICAS would be highly appreciated indeed. I've got pretty basic AWD2 controllers at the moment, because anything more complicated turned the car into pure RWD, don't understand why. 4ws I just copied from r34, and haven't fiddled it with at all yet.
Regarding other work, I made a new suspension geometry for Toyota Supra, as it is provided by the suspension program I'm using ("measured with digital micrometers on a lazer level lift"). It is quite different compared to Kunos', and it drives better, which was a nice surprise.