I purchased this refurbished unit from Calumet Dec 2005.
Here's the vehicle history:
In shooting interior shots with long exposures, I discovered a ghost trail from the specular highlight
of a lighting fixture in the scene. To address this issue Leaf replaced the sensor control board as
well as a noisy fan in Feb 2006. This sensor works perfectly even with the extreme wide angles like the 24xl; there are no pattern or digital artifacts even at the frame edges. The current exposure count is around 8500
I use this A22 on a variety of cameras: CamboWide DS, Arca Swiss View, Hasselblad arcbody, 500cm, SWC/M and a Fuji 680