I'm 5'9", 180#, and fetal/side sleeper in constant rotation.
Dimensions - 55" at head, 55" at hips, then a taper to 38". Head to hips is 36" and hips to feet is 36". I'll probably extend the length to 80", but for material estimation it's good enough.
For loft I'm thinking 8 ounces in 1.5" baffles on 6" centers, based on other quilts.
I looked at Thru-Hiker but did not see any dimensions.
Under 16 ounces IS tough, especially with such "generous" dimensions. But the real question is about shell materials. What is the lightest availabe, aside from Cuben?. After that the question is sewn-thru or baffled?
PHD is doing some interesting stuff, but are to busy to do custom builds now. They do have a 41° bag at 16 oz, so I believe a quilt should be possible.
Thanks for the input.