I am back!

A couple of updates:

1. The car is now 25 years old, so the DMV no longer requires an inspection on it, so I was able to get it registered and am able to resume working on it
2. I broke down and got a new MAF. I bought the Continental brand, which is apparently the same as VDO as they acquired that company some time back.
3. I have been driving it a little, no hard driving. I am now seeing a bunch of codes being thrown, but one I am focusing on at the moment is: DME code 246, Secondary air system, flow rate too low, bank 2.

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2001 BMW X5 3.0i, Automatic, Gasoline