color([1, 0, 0, 1]) {
	difference() {
		union() {
			multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 2.5], [0, 0, 0, 1]]) {
				group() {
					minkowski(convexity = 0) {
						cube(size = [320, 50, 5], center = true);
						cylinder($fn = 100, $fa = 12, $fs = 2, h = 0.1, r1 = 5, r2 = 5, center = true);
					}
				}
			}
			multmatrix([[1, 0, 0, 53], [0, 1, 0, 0], [0, 0, 1, 6.5], [0, 0, 0, 1]]) {
				group() {
					minkowski(convexity = 0) {
						cube(size = [30, 30, 3], center = true);
						cylinder($fn = 100, $fa = 12, $fs = 2, h = 0.1, r1 = 5, r2 = 5, center = true);
					}
				}
			}
		}
		multmatrix([[1, 0, 0, 53], [0, 1, 0, -7.5], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			group() {
				multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, -1], [0, 0, 0, 1]]) {
					cylinder($fn = 100, $fa = 12, $fs = 2, h = 10, r1 = 3.25, r2 = 3.25, center = false);
				}
				multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, -1], [0, 0, 0, 1]]) {
					cylinder($fn = 100, $fa = 12, $fs = 2, h = 4.5, r1 = 7.75, r2 = 3.25, center = false);
				}
			}
		}
		multmatrix([[1, 0, 0, 53], [0, 1, 0, 7.5], [0, 0, 1, 0], [0, 0, 0, 1]]) {
			group() {
				multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, -1], [0, 0, 0, 1]]) {
					cylinder($fn = 100, $fa = 12, $fs = 2, h = 10, r1 = 3.25, r2 = 3.25, center = false);
				}
				multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, -1], [0, 0, 0, 1]]) {
					cylinder($fn = 100, $fa = 12, $fs = 2, h = 4.5, r1 = 7.75, r2 = 3.25, center = false);
				}
			}
		}
	}
}