I have made my 3/4 length DIY UQ from a re-purposed down sleeping bag. I have channels on all 4 sides for the shock cord - sides for sliding end-to-end to adjust it under me, and the ends with barrel-locks to gather it to retain heat and keep out the cold.
My question is this: why / how often do the ends need to be adjusted? If you adjust the gathered ends (with the shock cord and barrel locks) to fit your hammock, why would they ever need to be adjusted?
Seems to me once the ends are adjusted to how you typically sleep, and the ends nicely cup the hammock, why would you fiddle with it?
And, if there's not a need to fiddle with it, then why not permanently sew in the shock cord to the length that gives you the appropriate gather on each end?
Make sense?
What am I missing here?
I am a Noob, so go easy on me.

Thanks..