Hey all,   I recently fitted a new headunit and was aware of a low volume output issue that seems to affect most aftermarket headunits due to the Bose setup in the Z.   I managed to figure out busters instructions for fixing this and have been running this setup in my car for a couple of week now with no issues at all, other have been running this for much much longer. Busters instructions aren't too good however and several members have been calling for a 'proper' guide, so