Hi Scott,
Please perform the following measurements:
1) Magnet Exit side. Hall probe measurement of Bx using the 4.64 mm tall Lakeshore probe.
X=25, 20, 15, 10, 5, 0, -5, -5.5, -6, -6.5, -7, -7.5, -8, -8.5, -9, -9.5, -10, -10.5, -11, -11.5, -12, -12.5, -13 mm (positive X away from V). Please check if the -13.5mm is feasible.
Y=0
Z=-200 mm inside the mag from the outer edge of the mirror plate, +80 mm outside the magnet, DZ =2 mm Ic = 233 A, 173 A, 120 A. The stage range in Z is 300 mm.
Time estimate = 3 currents x ( 23  x 141 grid) x 10 s = 27 hours