Repair manual, New Car Features, Collision Repair, etc., has been added to TIS as of today (the repair manual was actually posted earlier with the B46, etc., but then removed, it's back with only the B58 listed).
If you want to take a look you'll need to have or buy an account...
Haven't had a chance to take a look through it yet, but saw it was released this week, includes the DB23 (30i, B46H) and DB43 (40i, B58).
If anyone has friends at a dealership or has access, take a look. Part numbers are semi-typical PNC-based, xxxxx-WAxxx format. Not like how they did it some...
I contemplated making this in the garage section, but I figured it made more sense as a thread, since that's the format I kept it in while documenting the build. I spent years waiting and researching before I started this project at the end of 2015. I almost sold the car and was extremely close...