Yep, mine thuds a bit. Still like it, only had it for a day or so but it wicks perfectly. I do think I need to build a smaller 8 wrap/2.9mm ID setup in there, too much cotton in the wick holes doesn't help. Any luck with temp control? It seems these top airflow tanks don't do so well. Nothing wrong with the wicking though.Does anyone else obs seem to fire off gunshot pops when firing it for the first time after not using it for a while. Mine does this on every build. Quite scary how it pops on the first initial heat up