I was apprenticed in the forge when I was young. There wasn't much else I could do. [He rubs the back of his neck idly, a little embarrassed.] It's not that impressive, there's a cord that runs along his tail and body and connects to a pedal on the saddle that opens, closes, and shifts its position. It was a lot of trial and error, but works pretty well. One of my diagrams for the saddle and tail rig is in the note book somewhere.