Two notes on this excellent guide here:
1. Having completed the whole operation the second time around I’d straight go for the battery without removing the logic board.
2. The iFixit replacement battery didn’t completely fit in the center (I couldn’t screw it down without bending the battery connector). The connector part is a differently constructed than the original one, so beware if that’s the case for you as well.
Agreed, after reading your comment I also simply removed the magsafe connector.