We used no damper, no hearth plate and no additional air holes. The burn was controlled purely by the size of the gap left in the feed hole. They were extremely basic bits of kit only designed for a quick blast of heat in the tent whilst in the Arctic to carry out essential admin duties in comfort.
I bought something quite similar from China, its made from 15d silnylon and weighs nothing, it also includes a footprint to protect the floor. Build quality is incredible for the price I paid. I've pitched it once to check it over and its a fantastic bit of kit.
￡49.68 34%OFF | 3F UL GEAR...
I've never known a Wirral meet to take place, there doesn't seem to be anywhere to do it. I used to go to the Greater Manchester meets but tend to do my own thing these days. Made some friends for life there though.