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V_wall(h=4, l=height-rail_clearance*2-thickness); // top horizontal rib h_wall(h=1.6, l=right_rib_x); // middle-bottom h rib h_wall(h=1.6, l=right_rib_x); // bottom horizontal rib h_wall(h=4, l=right_rib_x); // middle horizontal rib h_wall(h=4, l=right_rib_x); // one more to mount a circuit board to module make_surface(filename, h) { for (a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16]) linear_extrude(height=a/h, convexity=10) projection(cut = true) surface(filename, center=true.

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