BellBoard

72 each Alan Tracy, Gordon Tracy, Harmony Angel, Klingon, McCoy, Neelix, Oink, Paris, Spock, Tuvok, Uhura, Vulcan, X-2-Zero, Zoonie; 36 each Enterprise, Intrepid, La Forge, Yar; 18 each Borg, Cardassian, Data, Ferengi, Jean-Luc Pickard, Q, Riker, Worf.

True Blocks of 72 changes
(1) Jean-Luc Pickard/Worf/Riker/Data
(2) Ferengi/Borg/Cardassian/Q
(3) La Forge/Yar (repeat)
(4) Enterprise/Intrepid (repeat)
All other methods rung as plain courses.