First version

Vitamins.scad

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+include <BOSL/constants.scad>
+use <BOSL/transforms.scad>
+use <BOSL/shapes.scad>
+
+switch_body_size = [8, 13, 16];
+
+module switch() {
+    down(switch_body_size.z/2) cube(switch_body_size, center=true);
+    cylinder(d=6.5, h=8.5);
+    up(8.5) xrot(15) cylinder(d=2.5, h=10);
+}
+
+switch();
+
+module screw_joiner(size, screw_diam=2.2, chamfer=1, edges=EDGES_Z_ALL) {
+    difference() {
+        cuboid(size, chamfer=chamfer, edges=edges);
+        down(size.z/2) cylinder(d=screw_diam, h=size.z, $fn=12);
+    }
+}
+
+left(20) screw_joiner([5, 5, 10]);