Dave e-mailed this to me on June 1st, but he refuses to acknowledge I don't check that particular address very often so I just found it today. He sent it after our trip to Snakeden Hollow, during which we discussed possible designs for a light weight and compact kayak cart.
Ingenuity at it's best. I bet it could be used with kayaks, canoes, light Jon boats and out of shape co anglers. Couple that thing with the shoulder harness we envisioned and I'll mobile as hell.