What is the difference between the difficulty modes? Do you get less money/points, are the opponents stronger (better cars) or does the AI get better (improved strategy)?

Why can I roll multiple full sets of unbuyable gear in the late game? I'm spending thousands on re-rolls just trying to find the last handful of highest level equipment for the achievement. Let me pay 100,000 to stop getting unbuyable garbage in the shop it's absurd that this is is ruining the last phase of a game I otherwise enjoyed....

I've read the guide on physics in the game and to a lesser extent the AI - it seems like it would be much easier to understand if the physics popup helped, or if there was statistical data available. For the popup: Show the stat that is currently most constraining speed Show if the AI is currently braking or accelerating more clearly - if the car is slowing is that because the AI is slowing for a turn or because the surface just changed? For statistics, I'd love some graphs -...

I do not mean to spoil anything for anyone, but can anyone provide further insight into how to drive a "purely imaginary" car? I have gotten every other achievement and there is very little left to buy in the junkyard, but nothing seems to be obviously imaginary. I thought this might be trying to run a race with no car, just a goblin driver, but I can't find any way to do that....

Are the grids random? I've noticed that grid placement has a big effect on the difficulty of winning a race (not surprisingly). It can be frustrating, especially in the knockout races where you have to win the final race. Would you consider adding a 1-lap qualifying session to each race with lap time determining grid position? Or maybe some other means of securing a better grid position, like winning the previous race or having a high elo ranking?...