koma said...
Try hooking your leash to between the two black plastic balls on the depower line. When/if you drop the bar it'll pull the depower rope to 100% and the kite will fall to one side of the wind window but i'll be much easier to relaunch.
Unless you are intending to unhook (Which it sounds like you aren't, since you have your leash set on flag) try using the Donkey Dick/(chicken finger) on the loop to prevent you from accidentally unhooking. In all the time of using one I have never unhooked by accident.
If you want to progress to unhooking, unclip from the yellow flagging line and connect to your depower rope. You can do this after getting out in the water so that you still have the option to flag when launching and landing -