I mean.. using excel calculated fuelloads to exactly 1l requires quite a lot of "balls".
And even if something goes wrong, woah, an engineer will save me from retirement! That's some next level balls.
But sarcasm aside, I can't see how deliberately giving my drivers a disadvantage for the sake of saving myself 5 minutes of typing in excel and then typing the result into the strategy format is ever going to be a problem..
Especially when the game even supports this style of pitting a lot of times. I feel like at this long track staying out just 3 laps without a pitstop (for a car with 0 durability) can trigger the engineer with enough mistakes and spinouts, especially at the hands of the pay drivers which are rubbish. In fact, my planned strategy for Kim and Donald was to pit every 3 laps. And that's not a lot more "balls" yet requires a lot more thought and a lot more of my time (and ultimately will give me the same result).