I am trying to remove the butt plate from my Anschutz 1416. I have removed the two screws and there are no other screws evident but the butt plate is still firmly fixed to the stock. I have also carefully tried to prise a knife blade between the butt plate and the stock but only managed to scratch the stock. Any ideas what to do next? The reason I am removing the butt plate is to increase the length of pull by about 2"/50mm (I have long arms!) so any suggestions about other ways to increase the length of pull would also be gratefully received.