cant seem to knock down my flame height, flame occassionally gets sucked up and over baffle. I have had this issue since install, 12/08. Didnt think much of it until lately I'm happy with heat output but trying to get stove to run as efficiently as possible. Flame height adjustment seems to have no effect on actual height have had it set -5 and still high flame. I called Quad tech he suggested turning down heat output, this works if on medium but then I dont have the heat output I would like. I have heard tale that there is an air adjustment on control box you turn with screw driver it has four settings 0,1,2, and 3. Mine was set on "O" and tech suggests it stay there because it is specific to North America. Any sugggestions would be appreciated. Currently burning Barefoot and Lingnetics.