I followed the C-clamp instructions to attach this to my aeron, but there were some issues. If you use the unobstructed holes on the back of the clamp, the slider is no longer perpendicular to the ground, and the headrest sticks too far in to be comfortable.If you use the obstructed holes on the corners of the clamps, the provided screws are too long so the headrest wobbles and can't feel right. I solved this problem by using a few washers and lock-nuts to 'shorten' the screws by about 4mm. It now works for me in that position.
Rating: [5 of 5 Stars!]