Yes I am aware, but see my post and Birgir's posts with the screw info. It's the bias pin losing contact with the driver when the screws become loose. Regularly tightening them should make them just as reliable as any other electrostat headphone. I don't care if you chose to believe a Stax dealer with no real evidence as to their failure over someone who has taken apart and repaired many pairs. I'm just stating what he told me in PM.
The Japan price is way over inflated compared to what you can get them for on Headfi.
(The Japanese are hardcore collectors, they love vintage electronics and vinyl, like old mono Blue Notes)