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Editing Step 3 —

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Screw on your new Volcano heater block until it is hand-tight. You'll be hot-tightening again later.

You will have to bend down the heater cartridge wires to get them to fit in the little indent at the top of the heater block. This is normal, and you won't damage it.

As when you built your first HotEnd, make sure that the nozzle is close to being flush with the heater block after screwing everything in. If your heater block is right up against the heatsink, you'll have issues printing.