A 3 2 4 1 2 3 4 5 6 6 5 2 2 2 4 4 6 2 2 2 1 7 A 2 6 5 4 9 8 B B 3 470mm 18.5in 18" 24" 30" 36" C 79.2mm 3.1in 69.9mm 2.8in 60.6mm 2.4in C 102.1mm 4.