hello
there is a solid body that i imported from SW that i want to cut .
i tried several ways like split , boolean , solid difference and amplitude and nothing succeed .
looking for help 
13.5 S.gh (14.1 KB)
SLOTPATTERN13.5.3dm (154.8 KB)
13.5 S eDITED.gh (50.2 KB)
Solid Difference is not a wise way when you do this large mount of boolean.
