Last smoke i did on my uds i was having so e temp issues. If i left my ball valve at half closed or less my temps would drop. Open it any more then half it would raise. I did some reading and saw sombody say that if you do a mix of lump and briquets it helps close air pockets in your badket due to the even size and shape of most briquets. Thus helping your temps stay more even for longer. Im curious how many people do this or have tried it and what their results were. Currently i use RO lump for my charcoal.