I was reading in Car Craft about this tool from Percy's High Performance. They said it worked well and it was almost dead on. Has anyone tried this yet, if so are there any pros/cons about it?
http://www.percyshp.com/index.php?option=com_content&task=view&id=9&Itemid=38
http://www.percyshp.com/index.php?option=com_content&task=view&id=9&Itemid=38