My advice is don't waste your time... what the hell are you going to use the move for anyways? Quite honestly, so many people waste their time with this "sleight." The only great thing I see about it is using it as a modified control... besides that, I see no use for it. Sure, it's a "new" color change but there are so many others that are just more economical and about three times more visual. If I were you, I'd forget about pursuing it for months like the rest of us did, or have contemplated doing.
If you truly want to learn the move, you're going to have to learn TONS of different fingers positions and tweak it around to your own personal style/handling. People have had SUCH trouble with the mechanics of this sleight, and I think that it is heavily dependent on the cards you use and the size of your hands, and the strength of your grip. So much to take into consideration, so I actually suggest meeting with a magician friend or two, at least, to see what they have changed. Often I am able to approach my mentor (whom I traded handlings with), and we were actually able to improve each others' execution.