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// Divot1: Centered cylynrical divot // Flat for D-shaped hole // begin arrow top cutout cylinder(r=8, h=10, $fn=3, center=true); for (z = [0 : sphere_indents_count]) { z_position = height * rotate_vector_cos; points = [ [right_edge, rotate_vector_sin * rail_depth] // top horizontal.

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