I purchased the car with the aero blades. I didn't like them at all. They would skip when the temp started to dip. So I just purchased the OEM blades, and I'm happy. The inserts are easy to change. I am not sure why this mod is needed, as Bosch aero blades fit in without any mod.
I can take some pics to prove this.

Cheers

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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P.