BMW already engineered the retention issue for the problem, short of re-desigining an attachment package that does not include static load butterfly bolts I would think the logical fix would be OE.

Butterfly bolts are for static loads only (hanging a small potted plant from the ceiling), Automotive panels are subjected to dynamic loads such as wind buffeting while passing 18 wheelers at hwy speeds.

If a I received my X back from a repair/mod shop and found those fasteners on my vehicle, I would be back there in a flash and standing on somebody neck!

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!