You should learn how to sew your own earpads, CDSA35000.
So I wanted to put detachable cables onto my SA5000s. I looked and looked and at first thought that mini-XLR connectors would be perfect. I was wrong, however, realizing that they'd be muuuch too big. It wasn't until I perused the threads around this place concerning removable cables for in-ear monitors and ear buds that I got the idea that I could use a set of Shure MMCX connectors in order to make the mod without tampering with anything on the SA5000s. This mod was grueling, it was not fun to solder these tiny connectors. I also retained the old cable I had been using, which is a monster at around 13'. I installed male MMCX connectors on that end too, equally as annoying to install, but it worked out in the end. I used a thermoplastic (softens when hot, hardens when cold) to ensure that the connectors would not push out when disconnecting or push in while reconnecting the cables. They are VERY delicate connectors, and I nearly botched the mod many times. $8.99 a pair (I bought two), I wouldn't want to waste money on them. They have no resistance unlike most MMCX connectors, which I suppose why their price is higher.
I used some high quality cables for the connections inside the cups and the sound is just amazing. Now I have a very short cable for listening to things in bed or portably, and a very long cable for listening sessions while walking around my room. :3
I also used PlastiDip to fix scratches and dings in the rubber lining on the mesh headband, I thought it would work perfectly and it did. Just a few layers in the grooves, then buffing them and the finish matches perfectly. I love tinkering with headphones.
The detachable cables were MAINLY wanted to prevent pulls and tugs from causing damage to the cable or drivers. I literally tore the cables out of the cups of my SA5000s once before thanks to an act of stupidity (i.e. standing up while wearing headphones with foot on the cable, thus shortening the length and causing the cable to quickly become taut). This is similarly why I installed detachable connectors in my CD3000. Both are gold-plated and securely fitted and soldered (non-permanent in both cases), and don't detract from the sound at all.
It also doesn't hurt that a cable switch can be done in a snap now. No more soldering, yay!