the back whip full is the best one so far, it doesn't need spinning faster. ur problem is the landing, just relax ur knees and use glutes to get a good one (and don't stick ur arms together cuz it look bad).
pretty much same for the other backfull replays.
for the front full (don't use other people's openers please) i would suggest spinning in the opposite direction because its easier.
if i get it right you tried to do a b-twist ish spin right?
if that so you need to build momentum by doing a spin (can be normal,hook or whatever) and then setting up ur jump. its much much easier