also they never seems to want to learn how to accelerate ? they've max 12 min 2 and they seems stuck at 2, despite having a high accelerate stat and me giving them very early (like the first upgrade) a different max and min speed
About the accelerating... some people say it didn't work, others that it works... to be honest, I know they "can" break and accelerate, but I never fully tested how they use it and why they tend to go a min speed.
