bin file and my own extended version of your XDF are attached.
I recently followed the s4wiki to set MSLUB/MSLBAS on my M/L box and was able to allow the SAI readiness to run and pass.
However, the same definition shows a small offset with your BIN. Is the 551T bin you attached from a A6 by any chance?
See screenshot for the offset:
Attached is the M-box definition I used (based on the standard M definition from the wiki) plus a few other things like "dwell time" if you're running 2.0T coils.