Just wanted to share this to make sure I'm on the right track.
I've ontained a wheel with the BT controls already installed:
Also, the clockspring from a 2013 WRX:
And I'm planning on buying this kind of head unit - Clarion OEM head unit from a 2011 WRX (Model: PF-3292A-A, Part number 86201FG620)
As I understand it, I would now need the microphone and I guess an updated harness, which I could get from you (SVXdc). Hopefully, this would make it easier (?), as I would need to hand it over to an installer...
Thanks,
L.S.