Found this link recently:

and was pretty fascinated. I have a Shen Hao 4x5, and already use and like my 6x12 Horseman back.

Has anyone used this back? Or have any information about whether it's worth the purchase? If it's wonky, then I may save my shekels for the 6x17 or 7x17 Shen Hao offers. (although if I spend any more on cameras, I may just find myself fighting the cats for food)

many thanks for wisdom imparted....