Firstly happy birthday toeside.

Yeh my brother had a bit of dialling in as well coming off the edges.
Yet the other guy I ride with (a very experienced rider) had no probs coming of the wainmens hence lies thereth the lessoneth
And I to had to watch him, ask then apply.
Basically as Eddie said takes a bit of active flying to start. Point ya board a fair bit down wind, get going with sweep of the kite, but then slightly bring it back into the window with a little movement. Do this a few times building up the speed of the kite and your board to a point you can lock it off and really crank upwind. If you feel you are losing speed a bit, do the ever so fast movements bringing it back into the window, ever so slightly.
It doesn't want large sweeping arcs, and remember the upstroke gives you nearly as much speed and power as the downstroke.
Take a little pressure off your rail on the upstroke, use this power don't waste it. These small movements can be done easily with one hand and it becomes intuitive and natural after a while. Feel the pressure through your front lines, keep it tightish, use it on the upstroke. This kite actually wants to initially fly forward in the window quite strongly, but then settle back into a really nice position. As opposed to say and edge which keeps wanting to eat the edge of the window and just stays there, generating an immense amount of apparent wind effortlessly.
By using the technique above you are using this aspect of the kite over and over again and although it is not as obvious as a high aspect kite it is there to exploit nevertheless. If the edge has taught me anything it is apparent wind generation.
In strong current you need to employ this technique quite a bit to generate speed first.
Hope this helps. My bro is starting to get it now and I'm sure before too long he will be out pointing me. He had some voodoo sht going on with the edges and would out point all of us!!