[QUOTE=Colin Corneau;704163]Found this link recently:
http://www.robertwhite.co.uk/product...2154&PT_ID=437

and was pretty fascinated. I have a Shen Hao 4x5, and already use and like my 6x12 Horseman back.
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Hi, Nick Meers here - I wrote abook about panoramics a few years back named "s t r e t c h ":
Just wanted to say that Robert White is an EXCELLENT store, the finest toy store here in the UK, I've known Robert for years; he and his staff are very knowledgeable and his prices are the best. Not so sure about the Chinese back you mention, and also not sure where on the planet you are, but if you're in the US I would for sure check out the amazing 6X17 rollfilm back made by Mr Canham, it's MOTORISED and costs around $1200: http://www.canhamcameras.com/Roll%20film%20back.html
this is very light, and of course when strapped on the back of a view camera makes it possible to have any lens you want, in addition to any amounts of swings, tilts, shifts etc-- actually if you go for this combo you will never ever want to shoot with anything again, it's the ultimate! Happy shooting and greetings from across the pond. NM