Users helping users. spacepeter from the German-Forum "HolzGibtGas" explains in a video his two DriZzleR. 50mm and 70mm DriZzleR. Very simple construction. and also blue gas as result.
the video is in German, but you can ask spacepeter also in english.
He has also experimented with various high charcoal beds.
Here are the different flare videos. There are also english versions in his youtube channel.