We've just done a mod to a XBow bar (which I'm using with my SBlades) that might be of interest for you guys. We managed to adapt the SS Turbo Diese 'movable' stopper ball to a XBow bar.
Yeah, I'm aware of that limitation. That's why I'm keeping one of my bars stock standard. In this way I can use the standard bar for very gusty conditions and the modified bar for steady and/or low winds.