I plan to make a full length underquilt from IX. Have a warbonnet blackbird. Any tips on the size of the darts? was going to make one long one on each end.
More info: was planning to sew pieces of IX to the main layer of IX in what I think is the "insultube" type of setup. For example- take a 5 inch wide piece that runs nearly the length of the quilt and sew each edge of that 5 inch piece down two parallel lines that are 4 inches apart- giving a 1 inch "loft". Nothing would be in that "loft" but air. Would have maybe 6-8 of these channels. Weight is not much of a concern as mostly do canoe or car camping.
Any thoughts or concerns?