I wish for it as well. Battery cover wasn't scanned here: http://neo900.org/stuff/werner/scans/

I might have access to a 3D scanner, but even then, battery cover is a very intricate object, so it's quite rare to see a 3D scanner that can pick up on this level of detail.

Also, battery cover from Nokia isn't just a piece of plastic - it has a metal spring inside, for camera lens cover. I wish there was a 3D model of Mugen battery cover - it's a tad simpler, no moving parts.

Thank you. Best wishes.
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Per aspera ad astra...