What I keep wondering about, is something like braided, high strength fishing line (what they use for deep-sea fishing) with a Tow-behind target. I am thinking 2 feet long, in a + type shape. Get a square piece of balsa and glue on some fan-fold foam. I just wonder about the drag on something like that... and the stability of the tow-behind.
I ordered a brushless motor and ESC this week, so I have the parts needed to make the EZ* you all saw, go even faster. Add a larger prop, and I would get more thrust... which means, it could "carry, or pull" more. :-)