Been doing nollie/sw heels for years now, they're still awful, usually bounce off the ground. Nollie/sw inwards are so much easier. I have to skate with a brace so I don't think I can get the proper flick for a straight flip, but the inward version is more of a straight kick out so it works a bit better. Sucks though, would trade those any day for straight nollie/sw heels. Nollie bs/sw fs heels and sw v heels don't work either, cannot create the motion of that type of flip at all no matter how hard I try, you'd think those are easier than the inward motion(sw bs heel, nollie fs heel etc) too :/