BMUAlignmentCorrectionsJuly2008.ppt shows progress with the BMU realignment.
I fit directly to delta-X, with the expected result that the systematic deviations go away and the overall rms drops 10%.
Code that does the job is available getCorrectedDelX.cc
Modified 29-July-2008 at 14:26
http://hep.physics.wisc.edu/~jnb/imu/29Jul2008