I think I mightve posted in this thread already, but seriously, just keep practicing, it'll come. Keep your feet together. I learned them on a nitro, I have a district now, and I had em dialed on my old TSI too, I can do em on any deck.
I learned them on bolted razor pro mod years ago and i can catch them flat now. Jump as high and kick as hard as you can at the same time, and lean firward a bunch