Hi there, I've got a 3 burner Broil King gas grill and I recently purchases one of those 12" pellet tubes with some apple pellets. I would like to do up a rib roast low and slow, but first I'd like to test the smoke out on some chicken leg quarters so I can get comfortable with it. Where in the grill should I place the pellet tube? I don't want to ignite the pellets or make too much smoke. Since my gas grill doesn't have any smoke vents, I am worried about over-smoking. Any tips would be appreciated. Thanks!