Wow, some very cool looking stuff there. It is equally fantastic and crazy that someone would design a completely new 11x14 camera these days! Love it.
The base rail appears to be the same as on my camera which is very light and can be packed very compactly by putting both standards on one extension and sliding it off the base. The front standard design appears to be based on the P0 or P1 ball head, which weigh almost nothing. May be the same at the back, blocked by the bellows in this pic. I was very impressed with these heads when I had a play with one.
Perhaps the supports are fixed and vertical shifts work in a similar way to the R cameras? That would explain the size and depth.
http://www.youtube.com/watch?v=ImWXhce7yAc&feature=relmfuHorizontal shifts are above the ball head thing, there is a dove tailed rail there.