I had sewn the lower spreaders at first. I did not like their effect on the lower hang. Also the lower spreaders and line suspension are part of my overkill design and I wanted to run a secondary (and last chance) support system through the lower spreaders. The grommets installed in the fabric and the lines run through the spreader bars just seemed so simple.
By the way, on the upper spreader wires I set two swaged stops outside the upper bars to keep the upper support triangle in place. It cannot slide off to one side when I am distorting the hammock by getting into one side.
Today I installed snaps on the CCF and ythe underlying fabric. If this does not stay in place, I'll just sew down the CCF to the hammock.
I started a rainfly today. I have a black rip stop nylon with a white rubberized coating. This fabric is very light and strong. Most important to me is the fabric is very opaque: it casts a harsh shadow unlike other nylons. I used two sided tapeto join 2 eleven foot panels. Then I folded the seam over and sewed it down twice, leaving a center tunnel that I ran a ridgeline through. Next time out, I'll set up the rainfly over the hammock.