Great guide. Thanks.
I would like to comment that I was able to achieve this replacement without removing the battery. Some care is needed to avoid trapping the tab on the battery adhesive strip whilst refitting the components. I used the largest piece of adhesive protection film from the new part, to allow me to slide first the headphone jack socket, then the speaker assembly, past the battery adhesive tab without crumpling or trapping it. This removes the riskiest step (battery removal) and means that I didn’t need to buy new adhesive for the battery. There is a significant time saving by not needing to detach the screen assembly, which appears only to be necessary to allow the manipulation of the phone, necessary for battery removal.