Alex - you need to check out the 07 Waroo seam, its really a great thing. The 06 seam problems are not just a Waroo thing, check out the threads going on about the seams on Cab's. You can also call Airtime repair shop in Hood River and get there take on it. Its specifically that type of seam and flat kites that is the problem, no particular brand is to blame.
Though I should say that there is nothing proving the 07 Waroo seam will be better (yet), it just looks and feels much better and cleaner. Adding the webbing was an extra step in the construction process for them to go through to improve the durability, so I don't think they would have done it if it doesn't matter. Webbing can be some damn strong stuff...
Sliding through the turns - I keep my hands in the center on any bar, so I don't think I was oversteering the kite. There is something to be said about putting all your weight on the bar even and still getting power. Makes for neat one handed downloop type manuvers and what not.... That's how C kites work and its the same with the 07 Waroo w/ direct rear bridle.
I think you might be right about playing with pigtail settings though, I didn't do that.
Next time I am in Oahu you should coach me on my jumps, but I think I was doing alright on the Boxer.
They were very high jumps and hung very long. I have seen the local team guys and they send the kite far too, they usually just kiteloop it back in front of them to account for it. Like I said there is nothing wrong with the jumping on the Boxer, it jumps great.