I can't seem to get enough heat into my ECB today, started one chimney of kingsford charcoal and a couple of chunks of hickory. It is 32 degrees outside. I have put a large thermometer in the lid to accurately measure temperature. I have modified it with 4 one inch holes in the fire bowl, drilled 5 3/8 inch holes into the top to get the smoke flowing through. Any tips or tricks on controlling airflow and heat in the smoker?