I want to fit an aftermarket head unit and am wondering how to get the maximum use from the steering wheel controls. Does anyone have the setup from Impulse audio and does it make the Bluetooth controls on the steering wheel work with the Bluetooth on the new head unit. Reason for asking is that I read on the webpage for the Axxess aswc-1 (American) that it enables all of the buttons on the steering wheel. Good video on youtube of the setup. Does anyone have any experience of this unit?