Knotty and Yukon - The BlackBird stretch side mod works great! You only need to do the entrance side. I sewed a tube and shock cord into where the 2 layers meet - 18 inches total. Of course it's only good to use when the side is unzipped, but there's no interference with the zipper. I've had lots of stuff fall out the side, so now no more flop. Even though the cord is near the middle, as long as you don't scrunch it up when you sit down or get out it works fine. You need to untension it more often, but it's worth a bit more fiddle factor for me.