1st was great, you saw the 2nd one, 3rd is good so far. This evening i pushed it up to 35W and got a burnt taste so I took it back down to 30. Then I changed the air flow to the 3rd biggest hole and it 35 was OK. So I pushed it up to 40W and another slight burnt taste. Put it on the largest air hole, went up to 40 and it's been fine. Lesson learned is you have to open the airflow as you increase your wattage.