KK this is actuallu pretty easy. The center is not alinged exactly center inside the strap. The center if off distorting the rotation. The red/green "handlebars" need to have their center in the center of the segment width. Rules of Joints Everything inside green bends with rotation Everything outside of red does not bend with rotation Everything between red and green blends during rotation. For a possibly smoother blend add more part segments. My experience is that you need rougly 10 to 12 polygons for a smooth circular curve

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