I only use the 321 method for pork ribs but this is all comes down to personal preference. Beef short ribs usually have a nice layer of fat on top which helps keep the meat nice a juicy so you can smoke them tender or you can braise them tender. I never use a water pan, spritzing with a solution works just as good I think and gives more flavor.Going to try the 321 method. Do you use a water pan as well?