The other thing that Iron Dreamer does is modifying headphones - changing the cables for higher grade wire, and adding 'Woodys" - hand-made wooden shells to replace the plastic shells on top-end headphones like Grados or Sennheiser HD-600's. He charges about $95 for the cable. For the cable and the woody, it depends which wood you have, from $295 (Mahogany) to $370 (Quilted Maple). Apparently Quilted Maple "Provides a richer tonal signature with wider soundstage with it's thickness."
Posted by Tom Whitwell. 
