I'm not sure what you are doing with your colors in your PSD file because your color layer is a finished product. Looks like you used my sample pattern from post #3.
Please post results using your own color pattern interacting with the Zig Zag pattern you have created.
You have been using a pattern fill layer and I have been using a layer style. Both work exactly the same in how the opacity is controlled. So I'm not doing anything different than you are concerning opacity.
My colors are on a single layer set to normal blend mode with the added layer style/pattern overlay.
One thing we are doing differently is that I used "black" on a transparent background to create my pattern.
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You used a more "grey" color on a white background for your pattern.
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Then you add in a solid color fill adj layer to dampen the grey...
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Since you did not provide a final effect, I'm uncertain how your technique will work in the final product.