The Lego Future flyers set comes with instructions to build as a plane or a robot. Looking at it my immediate thought was that would provide a suitable base for building a variable fighter in GERWALK mode.
First off I built both the fighter and the robot from the instructions to see what parts they used and any sections I could incorporate into my model.
With them torn down I set about building the fighter. It came out pretty well, the basic form is there but somewhat lacking in finesse.