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Editing Step 21 —

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Use a pair of pliers to crimp the ferrule to the leads. Do this in three steps: roughly locate the midpoint of the ferrule and crimp the upper portion (side with the thermal safety fuse lead), then the lower side (side with the heater cartridge lead), and finally crimp, one last time in the center of the ferrule.

Do this carefully. It does not take much force. You WILL damage the insulation if you squeeze too hard.

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