Assembly time. First I'm bolting the cross members to the Y Axis's, not tightening them up yet. Router frame is together and sitting on it's stand. Now I am leveling the frame using my precision machinist level. this took about 45 minutes. The cross members are just bolted to the Y Axis and can move around quite a bit about .025" in 2 directions. Using my straight edge and indicator I got the cross members parallel and equal distant to the Y Axis's by tapping them up and down where needed, this will make the t slot table lay true. At the back of the router frame there is no cross member so I added 2 pieces of 40 x 40 extrusion cross members to make the frame more rigid. next I will install the Y motors and start checking the y axis for straightness in the x plane