I purchased the drill press from Lowes years ago (floor model) and haven't really used it much. I am now getting to where I'd like to turn pens and ornaments, etc. I've noticed that when I get the drill to it's max depth, it will shift to the left a little. It drills straight until all the way down and then slightly shifts. It slightly oversizes the hole on the bottom of the work piece. I am not mechanically inclined, but would like to figure this out and see if it's something I can repair myself. Any suggestions or ideas is greatly appreciated. Thank you.