What do I think about the HE-400, Rev. 1 headphones? I've posted a comment here:
http://www.head-fi.org/t/604583/hifiman-he-400-impressions-and-discussion-thread/8820#post_9270412
It could just be a simple return of an item from a buyer. Still having the ability to return the item and keep the full warranty is a great option.
He's a busy guy. Also, the question as to how an amp designed to drive Stax headphones would work with orthodynamic headphones may have been a bit hard to answer in such a forum setting. I've never been to a headphone meet when a pair of headphones, other than Stax, were connected to such an amp. It is my understanding that amps such as the Blue Hawaii were designed to power the likes of Stax. However, the GS-X amps were designed for other headphone designs and put out around an honest watt of power. They also have their own dedicated power supplies which reside in a separate cabinet / case.
Can I personally provide more information than this? I honestly can't because playing up in the mega-buck amp leagues isn't necessarily where I want to go. I like to be able to afford to head my home, put gas in my car and food on the table.