I have struggled (like many here) to keep my UQ where I want it, especially on asym hammocks where the diagonal lie drags the UQ away from my left shoulder.
So, I tried a new approach last night that I wanted to share.
I went to my local auto part store and bought 4 alligator clips (like this pic)
Instead of electric wire, I put some black (3/8"?) shockcord (it fit PERFECT) inside the sleeve and crimped it down.
holding by UQ up to my wing on the BB
And voila...you can make any length strap and the alligator clip will 'bite' anything small enough to fit inside.
It did a great job holding the UQ in place, stretched as I moved around/got out of the hammock.
This might be a good solution for issues aroung the footbox on the BB hammock.
Hope it helps someone else