Yep they were definately 15'' aero's correct offset as the guy was saying they were bought, but wrong for his commodore and thought of machining them down (possible??).
Funny about the difference in wheels, the sle ones on my wb are correct offset 14'' but On separate occasions to 2 different tyre services I have had the blokes launch into a speel on commodore rims being wrong / dangerous for my car (until I have set them straight).