Carlson Civil does not support the concept of a secondary UCS to define and store North, as is done with LDT North Rotation. Instead, Carlson Civil relies on the use of DVIEW Twist to reorient North, and contains a thorough set of tools to work with that command. Any LDT drawings that are going to be brought into Carlson Civil should first have their LDT Base Point and North Rotation checked. If they are not all zeros, they should all be set to 0, have all points inserted to the drawing, and all linework moved and rotated to the location of the points.