I took a bit of a different route on my Speer kit hammock. I started with a length or cord about 36" long (something like Amsteel would work fine) and tied that into a loop using a Double Fishermans's knot. Then using a Prussic knot attached the loop to the descending rings. Next, I used the normal gathering method as laid out in Ed's book for the end of the hammock. I took that and folded it over the Double Fisherman's knot and secured the fabric with a tie wrap. Tested it all out and it held well with no slipping of the fabric. Here's some pics:
Anyone see any issues with this method? I gain about 6" of hammock length on each end over using the overhand knot that Ed talks about in his book.