Um, let me think for just a minute.... SLEDGE! The sledge has laser cut parts which in my opinion make the fuse construction a little easier. Althought the omp is a very easy build as well. And I think the sledge is a little better 3-d machine as it is easier in my opinion to get into stalled flight for harriers, and elevators and such. You couldn't go wrong with either plane but I would go with a sledge. Or you could do what I and several others have done, and get both.