Mark Stonich questioned,"Have you ever seen a 33t 110mm bcd ring? I haven't."
Mark, Sheldon's chainring BCD size table lists 33T as the smallest possible for 110BCD. I haven't seen one, but Highpath in the UK has fabricated some 27T rings in the 86BCD of the Stronglight 99 for me as well as 29T in the 94BCD. They will do 33T 110BCD.
Ken Wehrenberg, Hermann, MO USA, but now back in Santa Barbara for a while