text: Modify the file, checking (with an ‘X’) all the boxes physically checked at the party. (I also have an extra ‘write-in’ key that was verified that I will sign manually after the bulk.)
  Conveniently FOSDEM provide a keyring with the keys from the party in it. Using this we can give it to caff:
  I initially ran caff with the ‘no mail, no sign’ options to verify everything and it failed to import some of the keys.
  And finally ran it for real, at which point it prompted, twice, to make sure I wanted to sign the key and then fell-over: