Sunny is spot on with the removal. I typed in T5 door trim removal on google and found the uk T5 site which had pitures etc which gave me the confidence to pull the door card so hard to get it off.
On the front doors i completely covered the inner panel in flashing tape. This alone made a big difference.
Dont bother trying to remove the inner panel it's way too hard.
As i said just take the speaker off and try to get as much tape in on the outer panel as possible.