I've tried iracing a few times over the years but always give up (because shitty tyre physics)...
I swear the gods were listening, I saw iracing just released an update with a new tyre model for a few cars. As luck would have it I already own a couple of the updated ones so I gambled on a months sub and tried them. The Corvette C6.r GT1 is actually good now, the tyres are not on/off and wont kill you with no warning anymore (once they've warmed up!), and the FFB is much nicer so you can feel everything the car is doing once its dialled in. Skip barber felt ok too, though I only had a brief go in that and need to dial the FFB in more, but definitely an improvement
Why the heck didn't they do this years ago!
/end OT , back to your ACC race