I have the same dilemma as you. I have MPE on my M2C and I'm registered to go on 10/1. It is a 90 db day at Laguna.
Check this thread.
https://f80.bimmerpost.com/forums/sh....php?t=1750168
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Gone but not forgotten:
e39 M5, e36 m3, 12 X5d, 14 328, 11 328, 08 328, 91 325i