I'm basically in the same boat. I'm also running pretty much the exact same board!

I think one of my hangups on heelsides is that I worry the board is going to slip out from under me or I'll boot out (it even happened on my 28.6cm waist KT, but with my previous bindings which had a huge heel cup). Basically, if I worry if I go too far I'll just fall.

Last time I rode, I tried going to a more mellow run where I didn't have to worry about speed and just experimenting with heelside turns. I found out that I can angulate my board enough that I actually lose balance forwards, forcing me out of the turn!

Also, from another thread I think I figured out what people mean by "driving the back knee": Basically you want to bend (decamber) and twist the back your board at the same time.

• On toesides, your back foot applies pressure towards the center of the toe edge, between your bindings. That's easy to do in posi-posi, your big toe is aimed that way.
• On heelsides, your back foot applies pressure towards the center of the heel edge, between your bindings. That's harder to do in posi-posi, the arch if your foot is aimed that way.

I haven't actually tried that last point yet; I won't be able to ride until this weekend. But between that ("driving") and angulating more, I think you should be able to shorten your heelside turns.

Also, from your video I noticed you don't actually complete your heelside turns, you're still going 45° to the fall line when you transition. Contrast that to the toesides, where you're going pretty much 90°.

Thanks so much for the comment! Related to the heelside not finishing part, I always thought my toeside turn shape is too closed, which resulted in too low of a speed to continue to next turn. I actually haven't considered that my heelside turn is too open, I'm gonna try to be more patient with heelside turn. Also this was about 3 weeks ago, at the time i think i didnt apply enough pressure at the begining of the turn, which resulted the heelside gaining too much speed during the turn. This is something that I tried to improve last week, and i think my heelside got slightly better. But of course still need a lot of work. 

Hey @tmag,

Sorry it took so long but I'm trying to catch up on all those video analyses I promised.  Can you send me this footage in full quality please?  I'd like to put this one on YouTube, it's good footage.  I'll use TMag as your name so as to keep you anonymous.  Email to [email protected], dropbox, wetransfer, or google drive please.