The Lego variable fighter made from the Future Flyers set was a good first step but was a little puny for my liking. A friend had given me The Phantom as a birthday present and that was full of white and orange spaceship parts.
After breaking The Phantom down the new pile of bits were used to build out the variable fighter to something more substantial and with better form.
A bit later I picked up a seaplane set to add a few extra details to improve the look. (Unfortunately when I came back to photograph this it had lost one of its tail appendages.)