aluminum case:
AL-1
AL-2
X-1
X-2
X-3
X-4
X-6
X-5
X-7
X-8
X-8-3
X-8-2
X-9
X-10
X-11
X-12
AL-1 
AL-2AL-1 AL-2
X-1
X-2
X-3
X-4
X-6
X-5
X-7
X-8
X-8-3
X-8-2
X-9
X-10
X-11
X-12