Thanks for those pics! Planning to rewire for balanced myself, but I'm going to do a Y-cable to bypass the over-the-head "hoops". I love the sound of these cans with my Schiit Fulla, but this combination has an interaction that picks up RFI from a nearby tower, which I've found I can eliminate by placing my hands just so on the hoops. Hopefully a rewire will get rid of this issue.
For those that are hearing distortion at NORMAL listening levels when playing those bass tracks (no I'm not talking about all this rat&%$# bs), check to make sure you are not picking up RFI... test using a different amp, different location, bundling up the cable (this seems to eliminate the RFI for me), etc. The distortion can be a very subtle buzz that rides along with or modulates with the frequency/music (short of hearing an actual radio station when the music stops).
When I listen to the K7XX and Fulla in my basement or at work there is nothing but beautiful music with this pairing. I'm really enjoying the two together, especially given their combined price!