Diesel car 3x2x5(car base simple)

I tried to reduce the schematic of the car again, but I think I've reached the minimum in this thread (the same 3x2x5).

For full power, set the analog lever to position 5. To reduce power, move it up (position 15 is the engine shutoff position. I also previously used a regular lever to shut off the engine, but otherwise I wouldn't have been able to fit everything into this schematic.)

I think this circuit could be redesigned, and perhaps even faster, but I've settled on this for now.

Will I do anything else? idk, maybe, but for now, this is the most minimal and powerful option within this scope.

:^)