I am truing up the hull in x,y and z axes. I'm using a laser (double click on the image to see the laser beam trace on each bulkhead better), plumb lines and levels. Setting all this up was time consuming this morning. I got it very close to perfect; level side to side and only out of true longitudinally by about 2 mm. I set sting lines at the bunk level on the center line and from stem to stern. First I used the laser to adjust these then I placed the lines. My final check was along the keel using the laser. Now I am wiring the bulkheads to the sides and cutting bunk and deck stringers as I go. This is slow work but I guess that is ok as this is a pretty critical step. You can always rewire something but once it is all glued together that's it. You have to live with what ever bumps and curves you didn't take care of earlier.