I see you're opting for the "Florida Deep Winter" set-up.
For my Summer set, last year I made a polyester low quilt batting TQ with sewn thru "baffles" to go with my 2 layer synthetic partial UQ. I have used the TQ at HangCon 2016 comfortably down into the upper 30's and at the "No UQ Hang" at mid 70's and also comfortable.
I made the TQ slim at the shoulders so it wouldn't overheat, be less bulk, and can be used as a liner for Winter.
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