Thanks everyone. It looks like it comes down to the BavAuto tool on ECS Tuning for $102 or the CTA tool for $130 because of the needed flat edge for our E53. Any further advise on my choice?

https://www.ecstuning.com/b-bav-auto.../b8800028~bav/

https://www.amazon.com/CTA-Tools-869...all+joint+tool

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• 2004 E53 X5 3.0 ZSP (4/04 build date) Jet Black exterior/Sand Beige interior
• 2002 E46 325i ZPP (2/02 build date) Alpine White exterior/Hell Beige interior

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