Just received my Grizzly 7X12 lathe today and wanted to try it out on a Sten project I been building. After cleaning packing grease up for forever it was time to start. First thing I needed to do was swap out the chuck jaws for the external ones. That my Good Sir's is where my problem lies. I've been trying to get them to close centered and can't. The book says to open the jaws fully and retighten while applying pressure to the offending jaw. It's been over and hour and countless tries, but Na DA. Has someone encountered this before? I admitt it's been a few years since I've ran a lathe and not one quite so small but a lathe is a lethe is a lathe, right?