Editing Step 3 —

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Begin by preparing the backplate with two M3 x 8mm bolts as shown.

Drop an M5 nut into the back of the Backplate.

Fix the assembly together, making sure that there is no play in the switching motion.

The bolt should be tightened down enough to allow the heatsink to rock, but there shouldn't be any play along the axis of rotation or on the plane of contact.

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