Trying to learn grilling has been hard to learn for me. Several mistakes and I get away from it for a while but recently got back to it by reading your grilling/barbeque forum many messages. Getting low temps is hard to do. I had a hard time with the AmazeN tube using mesquite pellets but think I have it working well now. One mistake I made was partially filling the expandable tube and the outer cover covered the air holes blocking the air to get it started with a propane cylinder torch but not trying to get the flame too deep. A slight movement uncovered the holes. Raising the grates to better smoke and get a lower temp I tried but on my old grill and the best way was to remove one grate and turn it sideways to be able to use metal cans to hold it up and have food clearance. A main question is after the grill is warmed up to make the grates safe for food and turning them off and put the smoking tube underneath, how low of a temp can I safely use to smoke only back ribs for a while before slow grilling them with gas and the smoke tube? I noticed that my burner tubes and some grate bars are getting bad and should look for replacements. Any suggestions besides Weber ? My 3 tubes run the less desirable direction of L to R when facing the grill.