I've got a Toshiba 28ZD26P and a few geometry issues. I've had a look around and found the information about how to enter Service Mode and what settings do what. I've tried adjusting the settings but just can't get it exactly right. Is there a specific procedure that can be followed to ensure better results? For example, should I get one setting as close, then adjust something else? Any tips, hints and help would be much appreciated.