I have 2 Costco down throws I'm thinking of converting to an underquilt. I've ripped vertical seams on both already. I'm thinking of shaking the down to one end, then cutting/narrowing them, making them ~45" by 70". Also thinking of sewing the two together to make a big "envelope". Sewing both ends together, then one side and most of the third side, leaving a gap. My thought is, that this would give me the ability to add more insulation, like a blanket or woobie or the like. Thoughts? Would that work?
Also planning on adding tabs on each end and using the "clew" type suspension. The other thought is to sew each end first then shift the whole thing over (i.e. rotate it) one-half baffle width, so that the baffle seam from the bottom layer will be aligned with the center of the baffle from the top layer, hopefully eliminating cold spots from the sewn-through construction.
Would love any feedback on my plan...
--Matt
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