Hey Guys, I need your help and advice. I bought a Probotix Fireball V90 2 weeks ago and I've assembled it. I have one issue which I can't figure out. When I move the X axis the whole top apparatus will start to shake as it moves. The Y axis does it a little as well but occasionally it will get very smooth and move great. My question is, is it an alignment issue or lubrication issue? I oiled up the drive screws and rails and I got the anti-backlash upgrade if that matters.