Suggestion: Add some kind of Archimedes Ships Intergration. Like having jet motors and plane parts, ship controls and stuff. Say like, making an engine room on the boat, take some kind of pipe to output the heat and other fluids, making some sort of friction disc to put the propeller on under the boat. And on a plane make some fuel tanks pipe the fuel to a jet motor, and to the controls make some sort of control wing at the back of the plane, and a metal pole that goes from the steering stick to the back part. It ould be awesome if you did this!