It is the headphone lounge headband, and the rest of the headband assembly is from Martin Custom Audio, including the metal headband insert. I simply put that together, and moved the earcups over from the original Grado headband assembly, so I can change them back to stock in minutes.
Smart. I've heard of Martin Custom Audio, but never seen the website, so thanks for the motivation to go check them out. Metal gimbals certainly have to be low on any sane list of things I *need* in my life...so, why I do want them so badly?