How to replace the rear speaker in a 2004 Toyota Solara Convertible?

I have a 2007 and from a YouTube video I found you have to put down rear seat backs, remove interior corner trim then interior trim on rear posts, I have a hard top, not convertible. then interior trim across area at top of rear seats. Then you can lift out the interior back window panel that has speaker covers with it. Ordinarily speakers should be a 20 min job, Figure two hours minimum for this. It was worth it stereo sounds much better with higher quality speakers.