[damo]

Got it! Pixels is fine since you're able to get an accurate % difference.

I'm going to remove the passengers side first; not sure if I want to remove the driver's side (eventhough I think I use the passengers more when changing lanes).

Also as well as decreasing the frontal area, I'm pretty sure it will improve the cd as well, since the mirrors are aerodynamicaly very dirty and they are in an area of high pressure.

Is there anything else we can remove? :-)

I must work out the frontal area reduction in lowering my car 25mm. Got new springs partially for looks, partially since they all seem to break and also for a slight aerodynamic improvement!