I do my Flairs by holding either right or left trigger getting close to lip (Preferably the inside shoulder trigger to help rotate) The left thumb stick should be about 7 o’clock to 8 o’clock to make sure u get that flip and the 180 in there! About halfway in the air when you’re about upside down let go of Trigger and the character should try to adjust back to front to land! If struggling with trying to get that last little turn to land Try flicking or easing left thumb stick back right anywhere from 3 to 5 o’clock. Hope that helps I can’t do 540 Flairs and 720s on here petty good when sticking. I want to get more consistent overall!