Did mine today.
I found that the little clip at the bottom broke, as per Ryan’s description, however it doesn’t matter - its the small clip a bit higher up that slips under the metal part of the battery frame that holds the back in place.
I did a bit more complex engineering which would be too much to go into…but the end result is that I got a plastic ‘blank’ which I cut out to cover the mic spaces on top, which I’m quite pleased with.
I still need to cut down the plastic at the top a bit more and smooth it out….any tips on how best to do that?

