Smething I've struggled with is temperature control. I will start at 180 and the temp climbs to 350 and then proceeeds to drop. I have a CharGriller with side firebox (haven't used that much). If I understand correctly, I would need to opening/closing vents the whole time to tame the temp in range. I use charcoal briquettes and if bbqing I add 2/3 chimney hot 1/3 cold. Suggestions?