The left wing texture was moved outward a little to try to align the same colour bar with the edge of the wing component. The scale used for the wing is 15.00 feet over 256 pixels or 0.05859375 feet per pixel. In general, I have found that an offset somewhere between 1/2 pixel and 1 pixel usually work.
If textures for both sides are being moved, each should be moved about 1/2 pixel's distance. If only one side is being moved, it generally has to be moved 1 full pixel. Round down for fractions. In this case, I would have expected the left wing offset would be 0.05 feet, but that didn't seem to work. 0.06 feet was what I eventually used as you can see in the screenshot.
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