Guide was mainly well written. I was able to replace my battery in about 2.5 hours using this guide. I would recommend updating step 21 to remove one of the screws attached to the heat sink to help remove the I/O board and step 30 to remove the MagSafe screws before removing the logic board.

Same here. Removing the MagSafe screws should also be included.

Thank you. Removing the screw by the heat sink really helped get this board removed.