Thanks, surprisinglt, the driver traits change will actually be the most time consuming.
I am also trying to work out if instead of giving the AI a flat +50 Tech Boost per part, I should give them a Random Tech Boost (+25 to +75, or maybe 0-100) per part. To create some randomness and variability. A minor change so trying to see if it's worth it.
I'd give it to the player, but it would have to be generated each time you make a part, and selecting a new part would re-roll the value. So the player could scum the RNG.
I am looking at other areas to mod now / tweak slightly. I am open to suggestions.
I still don't think there's enough penalties for having a Fast Pitstop. The 2s time saved doing the quick stop is almost universally better then doing a slow stop. Even if you get the 'bad stop penalty) it's normally only 0.5s - 2s on 90% of the occasions, meaning doing the stop was still just as quick / quicker then a normal stop. I also don't feel the stats are as noticablepy effective as they could be. I for one only really look at the Reliabilty / performance value.