Using Oskar's idea, I tied two prussik knots on my structural ridge line, each one directly above where the underquilt ends. To hang the underquilt, I pass the underquilt's suspension THROUGH THE PRUSSIK KNOTS first, THEN attach it to my hammock's suspension. This has the effect of pulling upward AND outward. Seems to work well. I can adjust the upward and the outward balance by moving the prussik knots. Good luck...and stay warm!