I got 4-5 when I tried it. I was told by a noted scale modeler that was easer when FAI and the old precision scale rules were used; it was easer to hide problems. The old rules had a ruler that the judges used to measure the 3-view and then measure the model. He said it was easy to get the point to point distances and sculpt the rest to look right. He could hide things because the judges were always too close. The present rules with the judges back from the plane can see the overall picture and will know if it looks right or not.