Vac 700R BadBoy with Angelwings nib unit!  (BLS and Flex) "XF” - “BB” 
I had fun making this TWSBI Vac700 R nib into a very cool BadBoy! Work of art d’ya think? 
Screw this puppy into your Vac700R and make some art of your own. Photos above tell it all. 

Vac 700R BadBoy nib unit XF - BB