I also use a penny stove. Still playing with number and size of holes, i like 8 @ 1/16".
Have just finished making a penny woodstove to use as a winscreen/potholder or woodburner. Found a tomato juice can to be the right size for a heiny pot. I have found in cold weather a tea light candle burning under the stove keeps it rocking. Plans for the wood stove are on the same site as the penny stove. On my phone now so cant post a link.