10
Pre-assembly
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Fill every #1 with 3 M4 nuts, and lock them with #2. (12x #1, 12x #2, 36x nut M4)
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Fill every #4 with 2 M4 nuts, and lock them with #3. (15x #4, 15x #3, 30x nut M4)
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Insert 3 M4 nuts in #5, and lock them with #3. (1x #5, 2x #3, 3x nut M4)
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Insert the magnet in #5. A hard push is necessary to fully insert the magnet.
