So the empty weight is less by 88lbs despite the quoted CD-155 weight of 295.4lbs and the IO-360 weighing 296lbs to 332lbs. I wonder where the other 50lbs+ went? Supposedly the CD-170 weighs no more than the CD-155, it’s an impressive feat that the diesel weighs about the same as its gasoline equivalent, if not less. Shows how much of a dinosaur the old reliable horizontally opposed air cooled continentals and lycoming designs are, but I’ll bet nobody would want to spend a half million on a skyhawk just because it had a modern engine.