Diy Underquilt Suspension

Referring to my hunt for knowledge above i hoped on amazon to see how conventional underquilts were suspended.
Diy underquilt suspension. Eliminate any air gaps by adjusting the suspension of your quilt. Keeping it in suspense. I ve come to the conclusion that this design is not good. They are weather rated pre filled compressible easy to find and as a perk they come with a stuff sack.
I decided upon using a sleeping bag for the underquilt material. I noticed a lot of retail underquilts. The short ends usually have a cinch cord. The traditional underquilt is built by running a shock cord loop through sewn in channels down the long edges of the quilt.
I run shock cord the full length of each of the 4 channels with barrel toggles in the center of each shock cord for adjustment and an extra 18 or so on each end of the long channels to connect to my suspension triangles making the shock cord on each long side about 96 long. If a quilt is suspended with too much tension it will lose its loft flatten and its insulating qualities.