$fn = 50;
face_width = 14;
bevel_margin = 1;
cube_width = face_width + (2 * bevel_margin);
face_depth = cube_width / 2;
fd = face_depth;
pip_radius = 1.5;
pip_spacing = face_width / 3; 
ps = pip_spacing; 

difference() {
	minkowski() {
		cube(face_width, true);
		sphere(bevel_margin);
	}
	
	// I want to take advantage of OpenSCAD's x-y-z dot notation for vectors
	// Face 1 is on top (+z), clockwise 1-2-3, (+y,+x)
	// Faces 4-5-6, will then be (-x, -y, -z)
	// Faces 2 & 3 point together to face 6
	// a wall of face 6 is against face 5
	
	// Face 1
	translate([0, 0, fd])
		sphere(pip_radius);
	
	// Face 2
	translate([ps, fd, -ps])
		sphere(pip_radius);
	translate([-ps, fd, ps])
		sphere(pip_radius);
	
	// Face 3
	translate([fd, ps, -ps])
		sphere(pip_radius);
	translate([fd, 0, 0])
		sphere(pip_radius);
	translate([fd, -ps, ps])
		sphere(pip_radius);
	
	// Face 4
	translate([-fd, ps, ps])
		sphere(pip_radius);
	translate([-fd, ps, -ps])
		sphere(pip_radius);
	translate([-fd, -ps, ps])
		sphere(pip_radius);
	translate([-fd, -ps, -ps])
		sphere(pip_radius);
	
	// Face 5
	translate([ps, -fd, ps])
		sphere(pip_radius);
	translate([ps, -fd, -ps])
		sphere(pip_radius);
	translate([0, -fd, 0])
		sphere(pip_radius);
	translate([-ps, -fd, ps])
		sphere(pip_radius);
	translate([-ps, -fd, -ps])
		sphere(pip_radius);
	
	// Face 6
	translate([ps, ps, -fd])
		sphere(pip_radius);
	translate([ps, -ps, -fd])
		sphere(pip_radius);
	translate([0, ps, -fd])
		sphere(pip_radius);
	translate([0, -ps, -fd])
		sphere(pip_radius);
	translate([-ps, ps, -fd])
		sphere(pip_radius);
	translate([-ps, -ps, -fd])
		sphere(pip_radius);
	
}