I was at our flying sight yesterday with my UCD 3 D. I was having trouble in knife edge with mine, pulling to the left and rolling to the left. I mentioned this to an experienced modeler about this problem and ask him to fly my plane. He took off went into knife edge straight across the runway. He then did a knife edge horizontal loop. Then he did a knife edge loop in the vertical and commented at the top of the loop that the plane was a bit nose heavy to do it well. I watched him as he flew the plane and did not put in controls on the elevator or aielrons. I quietly said maybe I need more practice. He politely nodded. Will be curious to see if this improves performance of the plane by cutting a couple inches off. This pilot proved at least on my plane it wasn't necessary.