hey all i have a chargriller pro and like usin the side fire box but can never get the temp up in the barrel. wat is the best way to accomplish gettin barrel temp up. it seems to get around 140 or so and stay there. im using lump mesquite coal. how big of pile of coals? should i use the cookin grate to buil the fire as these sit higher or use the the grate on the ashtray and build a bigger fire? any and all help is appreciated. thx. and im lookin into the mods.