I was watching the Larry Potterfield video where he demonstrates how to correct cylinder end shake. He is shown putting the extractor rod (i think thats right) in a vice and turning the cylinder to unscrew it from the rod. I couldn't tell from the video but if one where to use the vise as shown and you were facing the cylinder would you turn it clockwise or counter clockwise. I'm thinking counter clockwise to loosen.
Ok, I just found another video and it actually shows him turning it clockwise to remove the cylinder.