I used to self land my kites at the edge of the window by letting the bar go but found they always kartwheel downwind from you tangling your lines in the process. I kite Scarbs 95% of the time and whenever I need to selfland now, I position myself next to a bin or sometimes next to the poles in the sand used for beach volleyball, make sure no one is downwind of you, hold the kite staight above you at 12 oclock and disengage, the kite flaps out of the sky gently and downwind already without kartwheeling. Then I just undo my safety line and attach it to the bin or around the pole so I can go to grab my kite and turn it over. Too easy, no mess, no tangles.
Thats my two bobs worth(also would not recommend grabbing any of your lines whilst self landing at the edge of the window unless you think one of your fingers is too long and want to do something about it!!!)