My modded pair just arrived on today's mail. Everything OK, just played a tune to see they work well.
Interesting, very first impression is of a very balanced sound, kind of "bold" tonally and quite open and airy spacially.
Since I don't think they have more than a couple of hours of burn-in, I'll be playing them for the next days before making any judgement.
Mark did a great job preserving the lettering on the cups. No one would say those cans have undergone some surgery. Just for the pads being thicker and a bit harder on touching the skull than what I recall from the stock ones, but still very comfortable.
Rgrds