EXCELLENT write-up! I had to go through these steps to replace a beat up door shell recently, along with window, locks, etc. OP nailed it on getting to the speakers.
BTW, my base speakers suck, too. I would like to replace mine...how much extra HP did those get ya?
I've spent almost every dollar I've ever made on FAST cars, COLD beer, and HOT women. The rest, I just WASTED! 2011 GT auto, Race Red w/ white C-stripes/Airaid/BAMA/Steeda cat-delete/Heartthrob 3" catback & H-pipe/Hushpowers/UPR CA's/FRPP 3.55's & diff cover/Tint/billet grilles/CDC chin spoiler/GT500wing & valance/P.A. trans pan/ARP wheel studs/AMR 18x9/10. RACEDAY: RaceStars w/big n littles. 1/8 mi. ET- 7.63.