Another alignment check is to make sure the screws that hold the hot rod in place are tight thus keeping the rod level and in close proximity to the burn screen. You don't want any pellets falling below the hot rod down to the bottom of the grill. To check those screws, you'll need to remove the 6 machine screws holding on the end panel. (The end panel has the blower fan mounted to it so go easy removing it once you have the screws out. The power wires for the fan may not have much slack in them.) They do have spade terminals on the fan so you can unplug them and lay the end panel aside if need be. Then just look straight in the end and you'll see the hot rod flange with a couple of screws.
American BBQ Systems model All Star, CS-570 & TG-300 pellet grills, Broilmaster P3, and lastly, Superfast Red Thermapen