In v20.0.0, the corner rafts CCDs are laid out like this:

The guider chips are correct (according to LCA-13381), and the locations of the wavefront CCDs, R44_SW0 and R44_SW1, are correct, but the amps are mis-labeled.

In v21.0.0, the corner raft layout looks like

The left-to-right orderings of the amps of the wavefront chips are now not correct, but and R44_SW0 is shifted upwards and R44_SW1 is shifted downwards relative to their nominal positions.  Similar problems are seen for R00, R04, and R40.  These new placements were added in DM-26205.