He's Otto Octavius, I'm not sure where you got "Gunther" from?

@Doc Filth. Sorry that's an editing mistake. His full name is Otto Gunther Octavius. I just must have missed it out when I was typing in the links. It doesn't affect clue, the links or the grid at all though, so I'm glad it was only that that I missed out.

Really good, groups, but could be more varied. Loved the Quin group.