difference() {
		sphere($fn = 0, $fa = 12, $fs = 2, r = 10);
		%cylinder($fn = 0, $fa = 12, $fs = 2, h = 30, r1 = 6, r2 = 6, center = true);
		%group() {
			cube(size = [6, 25, 3], center = true);
		}
	}
	multmatrix([[1, 0, 0, 13], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		difference() {
			sphere($fn = 0, $fa = 12, $fs = 2, r = 10);
			%cylinder($fn = 0, $fa = 12, $fs = 2, h = 30, r1 = 6, r2 = 6, center = true);
			%group() {
				cube(size = [6, 25, 3], center = true);
			}
		}
	}