The original quilt if that is what it is, by Jardine (as opposed to centuries of quilt making), is made with poly insulation. I think that is part of his system in a way that down could not be. If I was using down, I would sew it also. And even making a Jardine quilt with poly is a sewing project. But they are also disposable in the sense that the poly batting that is the same that is used in any poly sleeping bag, is cheap, and looses it's effectiveness. So you might prefer not to put it together with too much work. The bag is as simple as two layers of rip stop, sandwiching the batting. The sewing is basically just a perimeter hem that bonds in the batting. There are a number of ways of doing this with tape, and interfacing. The actual quilting is just a couple of stitches with a loop height the same as the target loft height, or a little lower. I have also used a tagging gun.

Sails can be assembled with this tape, you want the sticky stuff:

http://duckworksbbs.com/sailmaking/tape.htm

I have to say, I made a quilt around 79 using polarguard, and while the loft height is not all that great any more, it is still really warm, and I use it all winter long on my bed It was sewn around the edges, and I quilted it by sewing it right through. Not as efficient as current designs, but all this stuff about the poly failing, while true, relates to the optimal loft height.