Ok, narrowed my vibration issue down a little more. It is coming from the linear rail on the gantry accross the table. There appears to be some play between the bearings and the rail, probably a result of how the crate was (mis)handled during shipping. Obviously not bulltears fault. How do you adjust the clearance and preload of those bearings on the linear rail? I have absolutely no play when the machine is moving along the y axis (width of table) but a decent bit of play along the x axis (length of table). Maybe this picture will help... the green arrows are for the good motion, the red arrow indicates which direction the head shakes, and the yellow circle is the truck that the play is coming from. Thanks for all the help!