Trying to replace my 3 Jaw chuck with a 4 Jaw chuck (Yes, the 4 jaw chuck is undersized and I will have to return it and get the correct size because I'm a noob) The Chuck doesn't come off though. According to the instructions you should remove the screws and then "remove the chuck". I thought I'd ask here for advice before smacking anything with a hammer. The Chuck seems to be stuck to the "Chuck mounting plate" and it doesn't move in any way. It feels like it's glued into place.