Great work bringing this car back. Personally I never knew it existed before for AC. As far as feedback goes I feel it needs to be a lot more compliant over the bumps. I was driving at Silverstone today and was struggling through maggots-becketts complex as it is quite bumpy through there. I don't know enough about suspension settings to get it where it needs to be but I did at least make some adjustments so I could set a reasonable lap time. When compared with the VRC MP4/22 that I also ran today, it's a lot more difficult to drive (yes I know that car has TC but not that relevant in this case I think). I was 8-9 seconds slower in the MP4-13 than the MP4/22 and I think this is mostly because I didn't have any confidence over the bumps. In real life (on the old layout of course) the difference was about 4 seconds.
Hope you, or the original modders, or both can come to some agreement to keep working on this as it's great!
Do you still have the orignal fmod projects? Do you think it would be possible for you to recompile and release a working update? Save people like me doing bad cover versions?