like kent said pigtails are the best method for 2 reasons.. 1 because its eazy to do when adding kites to a stack and 2 necause if you want to remove kites from the stack for any reason you can do it at home or on the field.. the bestway to do it is to tie pigtails to all the kites towpoints and make sure the stack lines are all the same size.. the best way i did it was to make each line as long as the leading edge of the kite