As I suspected, BM3 does have more options:
I would select Lambda, MAF (after you clean it and your air filter - faulty MAF can lead to some timing corrections) and octane. I’m not telling you to do it, but you could even consider knock control as well. And if idle is choppy-: that as well. I did it, MAF, and Fuel trims reset when I installed my intake and again after my reflash. Perfect idle, perfect LTFTs and nearly perfect timing on 93.
https://datazap.me/u/amuroray/milvs-3rd-and-4th