Wow, just wow! That is a lot of work. I'm about to start doing something similar to my N63 engine. I've got a valve cover leak, I found that one of my turbo wastegate flap has a ton of play (no codes yet) plus I want to change all of the turbo oil and coolant hoses plus PCV stuff. Since I have to take coils out I'm replacing them plus spark plugs (it has 109K miles).

It is a lot of work just to get to the valve cover gaskets! Just ordered the injector remover from Amazon.
One question, did you replaced the injector Teflon seals? If you did, what tool did you use?