This is a move I learned from Marion Boykin (MB, for short). I’ve been practicing it for a about 2 months and it still is not quite there.
The most noticeable problem is that my hand wave is too large a motion. I need to really make that smaller and less “in your face.” Also, though it doesn’t show in the video, I can’t successfully do it all the time yet. I have to think about it as I’m doing it, too. These are both indications that not all the little moves that make up the Crimp Change have sunk into unconsciousness yet. That’s how you know when you really have a skill down. Think about driving a car or riding a bike. You don’t have to think about all the things your body has to do to turn or stop. You just do it. It is now an unconscious action. Same thing with musical instruments and any skill, really.
The Crimp Change was developed by Marion Boykin and you can learn it in one of his videos on Vinny Marini’s site here: http://www.vinnymarini.com/download/crimpchange.html