Are you an active professional astrologer?
If ever the scientific community decides to exclude Pluto as a planet, I think that would somehow lessen the objective and science-based perception of a lot of people new to astrology because the astronomers and scientists in the world says "it's not a planet" (and I don't think they would do that without scientific evidence) and the astrologers on the other hand says "it's a planet."
In any case, are you basing the 12 planet theory in the solar system from Zecheria Sitchin (
http://www.amazon.com/12th-Planet-Earth-Chronicles-Book/dp/038039362X )?