Hello all. I'm new to this whole smoking thing. I just purchased a Masterbuilt 30" digital. I smoked 2 butts last weekend, and amazingly they came out FANTASTIC. I'm calling it beginner's luck. This weekend, I'm going to tackle a whole pork loin and spare ribs (separately in 2 different sessions). I have a pretty good feel for the ribs, but I'm not sure how to smoke the loin. Any tips you could provide would be greatly appreciated. One more thing. When I smoked the butts last weekend, I didn't put any water in the pan and I kept the vent completely closed. They can out tender, juicy and falling off the bone. Under what circumstances should I use water in the pan and/or open the vent? Thanks again!