[Steve]

no link at the moment..running on the lappy as the main rig is still packed from the trip over here. i will dig it out once I get sorted though.

Putting the settings down to minus figures best represent an unprocessed JPEG ie the closest you can get to a raw histogram which is what you need to work from to get the exposure as close as possible. The Histogram shown on the camera is extracted from your in camera settings for JPEG shooting even if you are shooting in RAW. This is done automattically by the camera so its the next best solution to giving the most accurate histogram for raw that we can get. Normally the difference wouldn't matter that much as we have lattitude when shooting raw but since we are aiming to use all that headroom, anything we can claw back is a benefit.