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Edge or circumference using spheres (or rather regular polyhedra) arranged in a circle. // Number of indenting spheres. [mm] sphere_indents_radius = 3; difference() { difference() { difference() { union() { z_position = sphere_indents_radius + (enable_stem ? Stem_height : 0) + knob_height - sphere_indents_cutdepth; for (z = [0 : cone_indents_count]) { // Two Lumps.

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