Cool 8178. The first thing that strikes me is by side mounting the engine you get a wider, somewhat flatter surface in which to make the opening. I mounted my engine upright, as shown on the plans, and this meant cutting into a rounder and narrower surface of the fuselage and the necessary width of the opening ate into the vertical surface of the nose a bit. That makes the opening appear larger. On the other hand, the front side, or cheek, of the UFO is almost flat for a good 2 1/2" to 2 3/4" and would have allowed me to keep more wood intact. Theoretically, every model built should be an improvement on the last, but there's always some new problem or decision to be worked out. But, that's one of the things that keeps building fresh and interesting!