My second run today had some variation across the two boats (previous run was only 1 wf/boat). Results: Metal boat, test wfs, back to front: 1108A, 1134A, 1130A, 941A. Non metal boat, back to front: 1122A, 936A, 954A, 954A. Std Dev was about 6A to 13A. Measured on Nanospec litho.