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BGStudio Hi @noctividus, we are currently in the phase of getting printed samples and building a test setup to assess the noise reduction. 3dB reduction is indeed the design goal. Similar results have already been reported in aerospace structures using fractal segments. It would be great if Shapeways could help us with the samples since printing the props have proven to be really though with the 3D printers in our maker space. Thanks for your interest and we will keep you informed. By the way cudos for the snowshoe.