I guess that I could have designed it different, seems to lose a lot of heat at the sides of the unit. With the winds I experience here, it seems to blow the heat out easily, low setting with the winds blowing puts out the flame. Vent hole with manual open and shut would work better , maybe in the back.if the top was flatter I could keep a dish warm on top while cooking another. A shield over the top of the flames would cut down on flareups. Lots of wasted space in the bottom of unit. Maybe a single element with seperate control  to move the flame lower and not burn food. I do like it. Watch the food while it cooks so no burning happens .