Hi James, regarding tyres, certainly read
Jack's blog post from last November.
I quote:
I have also been considering changing the tyres in iGP Manager so that we go with Soft, Medium and Hard only, and scale the temperature / wear to each track, much as F1 plans to do next year. This way, we could make it so that there are 3 viable tyre compounds for every track, and they would be different compounds on each track, spicing up the strategy across the season. I’d love to hear your thoughts on this in the comments.