Looks good so far. One thing to keep in mind is that if you do an analysis right after changing to M1, there will be a residual effect from the BMW oil. Best to do a complete interval with the M1 before having it analyzed (second interval with M1) so it doesn't skew any results. Changing to different oils with differing basestocks, additives etc, can cause a cleaning of residual metals and dirt that could be misinterpreted as abnormal wear or oil incompatibility. Best to give it a chance to settle in before doing another UOA.
BTW, do you live near the ocean?