Funny you should mention that... Last winter I was teaching myself FreeCAD for another project and thought I'd whip up a sun visor mirror flap design for my son to make on his 3-D printer. Turns out this is a *very* complicated part for one of my limited skill to duplicate. Went through seven not
quite right variations before giving up in frustration. There is a real possibility that I'll try again and will post if I'm able to make one that actually works.
dj