Dallas Morning News staffer Tom Fox works the line at Franklin BBQ. (Photo ©Chris Wilkins/Texas BBQ Posse) We had several firsts for the Posse on our recent Best of Texas BBQ Tour. This was the first tour spanning three days and also our first trip taken to rank the top joints in the state. The results will be published in The Dallas Morning News and online on March 10. Another first was to have the Morning News assign a staff photographer to travel with us, documenting the 700-mile journey to the best BBQ joints in Texas. The Posse is made up…