Lulzbot decided to use 5V for their micro blower (why 5V and why a blower.. that CFM/pressure drop curve). If you have another Lulzbot toolhead you can keep the cold end voltage cooling mechanism consistent. There's certainly nothing wrong with the steps provided.
You have the wrong e3d link. Make sure to buy the 24V, 3.00 mm version, NOT the 12V, 3.00mm version.
I decided to buy a 5V 30x30mm fan to cool the cold end instead of the 12V fan provided with the E3D kit. This removes steps 18-25. The wiring/connectors for the 5V fan go where the blower connectors used to be. I can easily swap out the entire head and replace with my dual extruder when needed.
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