Hey rldavis. I've tried to remove that screw but it is also stuck. I almost stripped it. I would like to get confirmation from someone that knows what that screw actually does before trying to remove it the hard way. The reason I am trying to remove the tower is to check the inside of this lock since the aluminum ball moves back and forth making the tower shake bad. I have the issue on all four locks. If I cannot remove them I might need to insert some sort of wedge to avoid the shaking. Any suggestion is highly appreciated.