I found that you need to stand up straight on the trikke with a slight bend in the knees. The carves shouldn't need to be very wide and aggresive to go fast, all you'll do is just use up your energy. Stand up straight and give a push downwards as you lean the steering column. I found that when I...
youtube.com/watch?v=7Rq2cHUJ1DU heres gildo's video. notice how much more energy he's using vs this guy. they both look like there going the same speed too!
Loved your talk.