I gotta try this someday, but I might want to wait because if i'm taking apart the door i want to work on my lock as well. my door lock is like "broken"
I cant help you with the lock as i have not had to attack that yet (but i can guarantee it'll be awkward as hell!)
Door speakers wise, doesnt matter if you have premium sound or not, you just need to the 7 speaker system as a minimum as the 4 speakers ones dont actually have any door speakers...which sucks.
You need 2ohm speakers, which makes your choice quite limited as very few companies seem to make them, myself and many others have fitted infinitys (i cannot remeber the mkodel number but do a search as you need quite a slim model as otherwise the door glass catches when the window goes down although some speaker spacers may sort that if there is room behind the door card)
Sorry to revive but I too have a rattle coming from near the A pillar. I only noticed it after I put new Polks in the dash, so I assumed it was coming from them. I've been looking for months and can't find the culprit! Where exactly did you solve the problem?I tried to did my too, but sounds still persist.
Then I removed the door panel and drove the car out for a short ride and discovered the sound doesn't come from the panel.
It is from the gap between the left dash and the "A" pillar.
Gonna insert a cut off sponge to get rid the rubbing noise