I seem to have "play" in my hitch that is felt under acceleration, then again when braking. I can feel the trailer slide back then 'bump' against its stopping point when taking off at a set of lights, and the reverse happens when braking. I know some small play is normal in any hitch, but this feels more than what I feel should be 'normal'. I've checked all bolts and adjustments on the weight distributing hitch, and all is tight. The only thing I can figure is that maybe there is some play between the ball and coupler? The hitch is brand new.