I took today and cleaned up the sock - restitched a few things, added a zipper, made the suspension more permanent. Yes, I added a zipper. It's frown shape and allows me all kinds of options for entry/exit/venting/letting the cats jump in and out/etc.
I actually got tired of lowering the door for the 2 cats that love to sleep in the hammock with me - so I added another door - who has who trained is the real question.
So here's the final pictures. I'm very interested in the venting properties of the zipper door.
I got in a fight one time with a really big guy, and he said, "I'm going to mop the floor with your face." I said, "You'll be sorry." He said, "Oh, yeah? Why?" I said, "Well, you won't be able to get into the corners very well."