I'm new to the whole hammocking and DIY scene, but I recently made my own TQ and UQ using Climashield 5.0 Apex from thruhiker.com. The $80 quilt kit I'm assuming you are referencing is the one I used to make myself and my girlfriend each a TQ. It turned out great! Maybe I'll post pictures and info on here soon...
My underquilt is also made from 5.0 Apex from thruhiker, but the fabric on it is Impetus 1.0 from DIYgearsupply.com. For this project I only ordered one linear yard of Apex, which the good people at thruhiker interpreted as a 48" x 60" sheet! Based on my comparison with cottage companies, I'm assuming these quilts should have a 35 degree temperature rating. I'll be trying them out for the first time this weekend.
Hope this helped
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