2) When you build upon an existing aircraft design, it doesn't seem to tell you what the cargo size of the previous version was. See this screenshot, the previous version of this plane had no cargo space, yet there is no little * next to "no cargo space":

3) On a planet with 0.4 gravity and 42% atmospheric pressure, the starting design for the jet tactical bomber only has a range of 4 hexes and the starting design for the transport helicopter only has a range of 2. These designs should probably be changed a little to put more importance on their range.