I recently purchased a SE MkIII and the extractor doesn't work. Apparently when you open the breech block you're supposed to be able to pull it back against spring pressure and the extractor moves with it. Mine won't pull back. I've removed the very small screw that holds the axis pin in place and tried to pull the pin out. It won't budge. So, can you drive it out with a drift pin from the other end or is there a better way to do it? Thanks.