Remapping the ECU would be a good thing. The OPC Astra's torque wanders around like a drunken spider and there's a fairly cheap remapping to give it a flat 400Nm from 2500-5000 with an improvement in economy. Why it's not released like that I have NFI. I'd like it also if they can remap the throttle response settings.
I'd be taking in OPC1 for a bit of a session with HSV if they're going to offer that! As it is, I might get a friend of a friend to have a look at it.