We had success pulling. We put 2 of our best players at guards this past year running the Wing-T. One thing we did a little different though is when the pullers were pulling into the 2nd level we never specified who he was to block. We always found that the players would only seek that guy and pass up blocks too many times. Our guys were told to maintain their blocking "line = path of the blocker" and block anyone close to the "line" as they worked the play. The backs had to stay disciplined and read the pullers but it worked out tremendously well for us.