I thought I could make a paper pattern for the door pockets, and found that to be the wrong approach! After wasting the better part of at least two days I decided to cut a piece of material, lay out the tucks, and let the rest work out as needed. I won't go into the crap I went through to get the machine to sew a clean line, but I appreciate the need for proper setup!

I decided rather than cutting out a door panel I would make a prototype with a piece of scrap. From the paper patterns I decided to try 3 pleats with 1" exposure which would add 1/2" to the length at rest. I laid out the slots for the elastic and cut them out before stitching the top of the pocket.
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With the top folded over and stitched I measured the total width of the top edge and cut back the inside of the tube to let the elastic wrap the backer panel.
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To give the elastic room to pull into place I cut a small relief on both sides of the backing panel.
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I glued a piece of material on the backer panel, but the pocket section I just stapled into place for the prototype so I can take the elastic out for the finals. Here's the base pocket insert prototype.
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And this is the prototype on the door panel with the walnut accent piece above. I think it'll work OK for my needs.
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Now to cut the door panels and get after the real thing!!