A long time ago I tried to rig a Roc kite for Quad. It did fly and it worked to turn the kite somewhat, pull like hell or fly over your head, but in reality, it sucked.
I had much better luck with 3 lines using a nice "Y" shaped pecan tree branch about 5' tall. You just stick it in the ground and turn it right or left. Be killer for fighting because you could drop it or raise it quickly. Couldn't stake it out though....

Maybe I should look in my tree and try this again.