I have a Predator SP4RJ that had a wierd "clunk" sound when hitting. I spoke with Predator and they had me ship it back. They determined it had a bad ferrule and they replaced the ferrule at no charge. The noise is no longer there, but it seems like it does not get the action that any of the other Predators I have used get. I have no problem getting 2 or 3 times the draw with a house cue. I have noticed that when the cue is put together there is a sound at times if you lightly tap the butt end to the floor. I have used the shaft from other Predators on my butt end and it seems to solve the problem. Has anyone else had any experiences like this? I almost think the Unilock joint may be bottoming out but am not sure.