Hello! I have a FF Flicker quilt that I'm looking to use as an underquilt. This review (https://sectionhiker.com/feathered-f...-sleeping-bag/) suggests that all I need is "2 x 80″ packs of Gear-Aid elastic cord and a pair of Nite-ize #2 S-biners" to pass through the quilt's webbing loops. Has anyone done this and could offer any advice? Cheers!