For all the stove tinkerers out there - this chap has a YT site featuring an interesting design improvement for jet performance improvements especially in windy conditions. I've seen some meths stoves lately using angled jet holes for the tornado effect to great effect. This is using it on a diy gassifier wood stove and I was really interested in the flame design.
https://youtube.com/@camp2476?si=FtsRDBTxnfJEc1_H