Originally Posted by dejoha
After playing with this underquilt for some time, I made some modifications to the design. The problem with the gathered end also acting as the attaching point to the hammock is that I wasn't able to get a good, snug fit around the ends since they were continually being pulled taut. The tweak I made was to separate the gathered end from the attach point so both could be modular. I think this is similar to how professional UQs are made.
This design loops some shockcord through the ends so they gather and flex. I put fixed line (550 cord in this case) along the long sides. On one side, I was able to thread the cord through the hem channel. On the folded side, the cord just hung between the two sides. I attached this new fixed cord to the ends of the hammock with a bowline, which also gave me loops. Through these loops, I passed a section of doubled-up shock cord which was then attached to the hammock.
This new design provides a much more workable fit.
Could elaborate on your reasoning for having the fixed lines running along the long sides? Why not just attach the shockcord to the tied off ribbons at the corners?