Metal content: engine parts, control cables Wood content: wings and fuselage
We all like to build things in our shops, some shops are big, and some shops are small. We work from varied amounts of skill and time, and the projects we make vary from the simple to the complex.
But building an airplane from scratch, that, for me at least, would be a pretty big feat. And doing it mainly without one's right hand, well, you can judge for yourself:
formatting link
(note: there's a video on the page of the thing he built)
Jon