My Dad and I got bored one day and made 18 Torges style seats. We each had scrap plywood and about a mile of nylon rope. We then camo'd them with a dozen partial cans of spray paint we had laying around.
It was a cool project. It got us to clean out our garages, got rid of some scraps, and kept us off the streets for a day.
We passed them out to family and friends and I believe we still have a half dozen left.
One tip we pass on: Wrap the rope around the tree twice if you can. It really helps keep it from slipping and reduces rope stretch.