Thanks for sharing the pics and insights on the cause of the buildups!
I don't want to derail, but are you using a torque wrench when doing all of this work? If so, a fancy one, or a Harbor Freight/Sears one? I'd love to do some of this DIY stuff, but know that proper tools are a necessity, and I wonder how you other weekend warriors are equipped. I know there is a lot of debate about these, but would like to do work like this and other things on my CPO car, so want to have a perspective of how you do it.
2009 328i Jet Black with Dakota Brown interior - Nav, heated seats, Premium Package