Franklin Barbecue owner Aaron Franklin gives Gary Jacobson a tour of his new smokehouse, which is still under renovation following their fire in August. (Photo ©Daniel Gonclaves/fotobia.com) In addition to great food, one of the best parts of a barbecue tour is the wisdom it can generate. “The line is a good thing,” Dan Maguire said, sounding like a Socrates of Smoked Meat rather than a Posse newcomer. “It lets the food settle before we eat again.” It was about 1:30 or so on a recent Saturday afternoon and we had just arrived at la Barbecue in Austin. The BBQ…