The Sunday Rib Experiment: Part 3

Smoked ribs don't need to be flipped.  They should always be loaded with the bone side down and left that way.  You can rotate the metal racks up and down for even cooking however.

Check your water pan every time you mop the ribs (every 45 minutes) to make sure it doesn't cook off all of the liquid.  If your pan runs dry so will your ribs.