RE: I can never do Fs tailslide? - Impossible trick for me?
I just learned FS Tail, took me 6 years to learn it hahahahah but what really helped me get it was try popping considerably taller than the ledge so I have time to rotate myself well enough and put my weight on it.
Before, I tried to ollie straight into the Tail, without much air time.
Maybe that helps you out!