In my mind, this pattern will keep the down from shifting from the midline better than a straight horizontal or vertical baffle. The design is the same that Enlightened Equipment uses. It does take a bit more math to determine how much down each baffle section requires.
In order to sew, I used a continuous piece of no-see-um for each individual baffle. At the turning points, you leave the needle in the fabric, lift the presser arm, and then rotate the quilt before proceeding. To combine the top and bottom layer, you must connect the center baffle first and then work your way to the outside.
Probably a bit more time consuming than a horizontal or vertical baffle set, but I suspect better down distribution and less shifting.
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