i think you are focused too much on finding the right time that it is messing up your whole trick, just conecentrate on what your going to throw, and you will naturally pop
ya but most people who spin left grind right foot forward, so to do a natural grind they would have to look over their right shoulder, and that practices looking over the wrong shoulder for spining switch off a jump. so i don't like that advise.
i fianally started hitting rails that have gaps switch. i dont know why i was so scared. its just wierd to not be able to see right where you are gonna land.
i find it best to think more about the trick than the pop.