True - I was just thinking that because you need the vertical height for the bluetooth module anyway, one might as well stack, a la: http://i.imgur.com/gDrh7r4.png
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I see now. When the performance of the NFC antenna
is not degraded it could be done I guess.

And it's WiFi btw, not bluetooth:)

Regardless, though - very neat   Just a design for now, or planning sales?
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Just a proof of principle, playing around a bit:)