You forced your own flesh-and-blood to suffer the FZ pillion seat? I’m surprised she didn’t swing for you.
Anyway, I’m glad you had a good time. The Panther (yes it is) looks cool. The builder has put on a sprung seat and then mounted it so that the solid mudguard stops the spring from working… ha! (The top section of the frame from headstock to ‘seat post’ is original, and the front end looks like it might be too).