I'm thinking of converting a rectangle (non-diff cut) TQ into an UQ.

How does one calculate the expected temp range of an UQ? Or, if I know that I can use my TQ safely to 40 F, if I use it as an UQ, what temps should I expect?

I have never even seen an UQ set-up on a hammock
Is it still considered "thinking outside the box" if you have never seen the box?
Thanks for any input...