Berk is sending me a replacement for the back part to exchange but in the mean time they said i could keep the current one they shipped and try to tweak it myself. I almost fixed it 100% but it's still not quite there. It will do for now until my new rear section comes.
Oh and this is without any other modifications. No nuts, no washers just bolted the way it's suppose to be. After i tried the "washers fix" I experienced a very annoying vibration and removed them.