I had purchased the XT268T kit last summer which comes with the XPH07Z hammer drill. The drill also comes with a side-bar arm that clamps to the drill for better hold and control for heavy tasks. When i used the side-bar arm on my drill, I am actually unable to then remove the side-bar. Ideally what's supposed to happen is that unscrewing the side-bar should open the clamp up so that it can be removed from the drill. However, when i tried to unscrew my side-bar, it actually unscrewed the handle from the clamp instead of releasing the clamp. Has anyone else encountered this problem ? i'm trying to understand if this is a design flaw in the side-bar or if this is a one-off and i just got a bad side-bar.