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I received my speakers today and can confirm that the rear door speakers are just a few mm to tall and the bottom of the door card does not sit flush. I managed to install the front ones ok. Sub is being installed on Friday. Might replace the stock rears and call it a day.
I hadn't tried to install the fronts, just the rears, assuming I'd have problems all around. Based on your post, I went to the fronts. Indeed, no problem, they went in fine.
I still have had no contact from BA, I assume they're simply never going to respond. So I decided to do what I could to install the rears.
I took an 4.5 in angle grinder with and used a 40-grit flap disc to grind back of the bracket to reduce the size. I took off about 2/3 of the fiberglass all around to try to make the speaker stick out less. This is a messy job but after a while I thinned out the back of the bracket as much as I thought I could while still leaving it thick enough to mount it. (Probably reduced it 2/3, leaving 1/3 the original thickness.)
Went to remount in the rears. Closer, but still wouldn't permit the panel to completely clip.
Then I looked closer and saw that one of the screws that holds the speaker together (on the front of the BA speakers holding in the stainless ring around the speaker) was directly striking the door panel. Coming from BA, some of those screws aren't straight. I had one missing altogether. Others, the nuts on the other side were only partially screwed in.
I took off the panel again, removed the speaker, then took out the offending screw (and nut) using a T10 bit. Replaced the speaker. I was able to make it fit. Both sides, by removing the one offending screw on each side and the reduction in the bracket size.
This was a lot of work. But if I am stuck with these, I guess it was worth it?
I really believe these speakers could have been really great, if they simply had been manufactured better. Photo is of another screw that you can see bending the plastic on the back of the door panel, but, I was able to get the panel around the screw and the panel to sit properly.