This may go against the DIY'er grain, but what I'd really LIKE to do is give Stormcrow $300 to make me a top-notch, custom length down UQ. The problem is the $$$, of course. So my question for the DIY gang: if you were using synthetics (to keep cost down), what would it take to make an underquilt that would keep you toasty down to 0? And how much would something like that weigh? Or maybe I'm off-base on materials and 800-900 FP down can be had for a reasonable price?
I'm also a complete novice behind a sewing machine, so level of difficulty is a concern. My DIY basic double layer is almost done...if that thing doesn't dump me on the ground I'll feel a little better about my sewing ability.