The final step is to bolt everything together. I used a washer on each side the bolt and a tightening washer on the nut side.
After using it a few days I've thought of a couple of improvements. The angled beams flex quite a bit when the hammock is rocking so I think some tensioners running from the top of the beams to the edge of the feet would increase the stability. however they could become tripping hazards!
I should also note that I choose these dimensions based on my hammock's length.