Filter Replacement and sharing experience

Hi all, there appears to be moderate interest in doing the filter rework and I encourage anyone that modified a phone to share the experience with all of us. I have created a simple docbook that uses the pictures uploaded by Luka and annotates them with a "calloutlist". The docbook xml can be found here[1] and the draft PDF is in the wiki as well. It would be nice if all of us could contribute about the motivation of the rework, maybe a bit of history (how the RX path was identified, how new baluns were selected, ...), experience/tools used during the rework, review the draft, note the differences of the various phones. cheers holger [1] http://bb.osmocom.org/trac/attachment/wiki/Hardware/FilterReplacement/userm…