Very nice work and a very tightly designed layout indeed
Weather sealing is indeed excellent!
What I dislike is the spring pre-tension of the sensor assembly, last image, if it is indeed the sensor alignment that is made adjustable for calibration I don't like it, should be with shims like the current DSLR cameras... Only way to make safe it doesn't shift.
I also dislike how the sensor plane is moved to the front of the camera housing, makes the whole contraption really fat with a FTZ adapter mounted, the finder sticking out just adds to the bulky look and feel.