Mental giant that I am, I'm having some trouble getting by brain around rear asymmetric tilts. I understand the principle well enough, but: Is the rear tilt axis static, or unadjustable? The asymmetric swing on the ebony appears to be variable when used in conjuction with shift, so I was wondering if the same held true with the tilts when used with rise/fall. The grid on the ground glass seems to indicate that it is static, or at least that there is perhaps a detent or mark on the movements that will align the axis with the grid on the ground glass. If so, I wonder how this axis was arrived at, by scheimpflug math or some 'averaged' compositional standard...I also wonder if it would be a good thing to have an adjustable asymmetric axis, or if that would be too damn much of a good thing...Any thoughts on the matter appreciated.