Following on from my original post:
http://www.e90post.com/forums/showthread.php?t=364359
I today installed the Logic7 tweeters.
Pretty straightforward and took around an hour all in.
I bought my parts from Barons BMW Farnborough who were very helpful. Big thanks to Chris in the parts department there. Barons gave 15% discount on what I bought.
Parts Checklist
1. BMW Logic7 Tweeter (2nr) 65.13.6.964.013
2. BMW Mirror Interior Quadrant Panel (2nr L + R) 51.33.7.184.197 / 198
3. BMW Mirror Interior Quadrant Panel Foam with Tweeter Hole (2nr L + R) 51.33.7.119.173 / 174
Activity list / Guidance Notes
I followed this excellent guide to remove the interior door panel:
http://www.billswebspace.com/e92DoorPanelRemoval.htm
Once the door panel was safely off, it is very easy.
To remove the existing mirror quadrant panel, simply put your fingers behind the upper part, next to the window and pull it forwards, the top will pop out of it's clip and then lift the panel upwards and outwards to remove.
Assemble your new tweeter into it's foam panel and push the foam panel into your new quadrant. Simply plug it into the midrange speaker in the door and then put it all back together again.
Immediately notice sound is much better. We can now hear high hats!
Very poor form from BMW not installing a tweeter in such an expensive car.