@sdi_03 I tried your tune out but found the gearbox was just maxing out 75% of the way down the straights, so I was sitting at 205kph and not improving, losing time overall. I modified the final gear to max out at 225kph and instantly found 0.4s improvement over the lap. I like the majority of the tune but can't work out why you've made the gears so short?
FYI, I can't actually get the same ratios - have you used a gearbox glitch for this one? I had to get as close as I could, but the numbers were actually all a little higher (but the lowest I could make them).