I also repaired a set of Juzear 41T IEMs. From new these had a buzz and after some trouble shooting it ended up being one of the mid armatures. So that mid armature is removed from both ear pieces now and I have a working set. Minus some mid volume.

Took a planar driver apart the other day to try and fix it. It was a no go on the fix but the driver still works intermittently. I learned a lot in the process. KZ PR2 14mm planar driver.