slipping out on the landing of ts tricks (from simple jumps to batwings), is a very common problem.
this paragraph from mike mclin's ts backroll instructional gives good advice about the ts edge:
Edge into the wake progressively on your toeside. Start your carve towards the wake nice and slowly and build speed as you approach the wake.
Upon landing, you want to make sure to land on your toeside edge or on the middle of your board. You do NOT want to land on your heels. If you land on your heels, your board will slip out from under you and you'll either butt-check or fall back badly enough to where you can't land the trick. So when you land, you want to be edging out on your toes.
i find that one the most common problems people have with the ts edge (including myself), is not standing up straight. many people bend at the waist. you want to lean away from the boat against the rope, not bend over to get your weight going in that direction. if you're not standing up correctly it's difficult to edge properly and thus landings are off.
this is usually exacerbated when people are trying to cut harder - whatever we do wrong (even if we do it right at slow speeds), gets more pronounced at higher intensity. that's why the progressive edge is so important - it's easier to maintain proper form if you not thinking about going all out - but more concentrating on gradually building up your edge by maintaining a strong body positon.
the other main problem is not staying on edge up thru the top of the wake. this is critical and has everything to do with how you'll end up landing. if you don't maintain that edge, your body position is subtly (sometimes not so!) different and you come down with your weight wrongly distributed over your board - you fall or slide around.
concentrate on keeping your edge all the way thru the top of the wake and keeping your weight over your board - exaggerate it even, see if you can fall out the front instead.
checking out this article in the instructions section may also help ya: http://www.wakeworld.com/Tricklist/TrickTip015.asp
hope that helps. let us know how you progress!
(Message edited by deepstructure on February 04, 2004)