I have modeled the magnet system with symmetric steel and with the real cut-out for the turret. The attached files cover a volume r=[100,140] z=[-100,0] theta=[45,135] with cm spacing in r,z and 1/2 degree spacing in theta. ~750K points, Bx, By, Bz and |B|. Question: are the models close enough that even the parity studies can live with symmetric map, i.e. model only one-eighth the magnet?