Wow thanks for this info. What about Cambo Ultima 35?
I hadn't seen that one before. I knew about the Cambo X2 Pro, but had no interest in it since it seems to only have front-standard movements. Without rear-standard shift/rise, flat stitching isn't really practical and that's one of the things I'm interested in.
The Ultima 35 appears to have the full range of movements, which is definitely appealing. Unfortunately there's not much info on their website, they don't even list size/weight specs. I have a feeling this camera could be quite a bit heavier than the M-Line 2. You'll note that lens compatibility is an issue. They only list one lens wider then 72mm as being compatible (the Schneider Digitar 28mm). They also have an adapter for Mamiya MF lenses; but I'm not sure what the availability and optical quality is for those lenses though. The Arca-Swiss guys seemed to think the new Rodenstock 40mm and 50mm HR-W lenses might be retro-focal enough to work with this type of camera, but hadn't yet tested to find out. That's one of the things I'm waiting to hear back from them on.
Since this is such a niche market, there's not much available information out there on these cameras and their capabilities, quirks, and incompatibilities. It'd be nice if there was detailed enough information (including user reviews) to determine how the M-Line 2 and Ultima 35 compared with regards to size, weight, construction, precision, etc.