I have been using that technique to make sure the cigar burns even with out running or tunneling as I smoke as well...as I am drawing, I'll watch the burn line to see if I have the amber lighting the whole way around, if when I am done with my draw I don't see the a nice red ring all the way around the burn line, I will carefully keep on sipping until I get an even burn...It has been working for me.

Hope the description makes sense.