Yes the storage box does have the magnetic, and one side smooth, yet opposite side slightly more brushed.
I have removed the driver, and have already confirmed authentic from comparing to other pictures. However doing so, I have violated Sennheisers terms and conditions regarding warranty. Not that it matters anymore, the bass adjuster was working originally. However I have been using them with my Pioneer receiver, and couldn't differentiate the bass dial. Once I started using them with portable source, the difference was much more distinct.
After 100H, I'm still not impressed though, they sound rather muddy compared to my CK10. I suppose I can't really compare them considering the sound signatures. I do believe the IE8s to be more pleasant and suitable with rock though.