I don't think so. 6x12 is just the panoramic format with roughly [4x]5" width. It makes a lot of sense to use the TW as a panorama tool, a giant XPan kind of.
If the Shen-Hao works I might pick one up. The Horseman is pretty awesome, and probably second only to the Linhof. The lever wind and automatic stops already make it better than the typical Chinese backs using knobs and red windows.
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