so the other day I pre-heated my smoker with no wood or water present to 225. I then added 2 medium size aluminum trays above where the stock water tray is and added my chips to the cast iron skillet. Placed my spare ribs 3/4 to the top. the smoker maintained a temp around 180*, is that ok? had the meat in there for about 2.5hrs and got a great taste. I did have to add chips at the 2hr mark so I figure if I was to go with wood chunks I could avoid having to open the door so soon. also the rear vent was half open.