So, I got some hd 558s for christmas, been using them, they sound great. Anyway, I have some questions. 1. are they supposed to be this flexible? They pivot very easily, but fit perfectly. 2. the left side takes more force near the end when I am pushing them back in, hardly noticable, but enough to be noticable 3. Is the faint(usually non-existant) staticy audio that one can barely hear on some songs caused by those songs? I am assuming yes because it is only some, not all. 4. How long can I safely listen to them at 80% volume on a fiio e10? I feel worrisome, but I am a bit paranoid at times.