As you said, you've watched the XB teaching. De'vo teaches that you should concave the deck slightly before doing it. This helps in the weaving action.
I really advice you to learn the weaving action for a giant fan first. This helps you to get the feel for weaving cards. Once you've learnt that, make sure you are doing the weaving technique correctly when doing the shuffle. The pressure to weave the cards is created by the pinky.
The thing about flourishes you need to know is that it takes alot of time to practice. You can't expect it to work like a self working magic trick. The one handed shuffle to me ages to learn and I can finally do it fairly smoothly with my right hand but I can't do it with my left. Just remember...
practice, practice, practice!!
Steve
