What's easier to design? After having done this for so long, i find that different people do different things. I myself have no problems building gliders straight out the hangar. But a couple of people i fly with can't stop making planes that fly straight as a rocket. It seems universal though that stunt type planes seem to be harder to create right off the bat. Maybe that is more because people don't usually try to make those as often since they need a plane to fly down a hall like a rocket can or glide forever.