Nice writeup!
Here's a link to another post where they found the part number for the M5 adapter/absorber, which eliminates the need for any cutting in order for the Comfort Access to continue working with the M5 rear diffuser.
http://f10.5post.com/forums/showthread.php?t=950378
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2014 LCI 535i
/// M-Sport - SAT, Premium package, HK Audio, Drivers Assistance, Top/Side/Rear cameras, multi-contour seats.
Mods:
V2 coilovers, Michelin PS4S, Opticoat Pro, Quad black chrome exhaust tips.