Well, I would've loved to have had a great update for this thread. But in a sudden turn of events, I got an offer I couldn't refuse on the M3 and the car has been sold
I'm probably going to regret this quite heavily, but also have a feeling it will not be the last E46 M3 I own.
Very glad I got the opportunity to own this car, its an absolute gem. But for now, a new hunt begins. Thank you all for the support on this thread.