I was seasoning my smoker last night and the instructions recommended 2-3lbs of charcoal, then get the temp up to 250 and maintain it for 2 hours. Then open the smokestack, add charcoal and get the temp up to 400 and maintain it for 1 hour. Well I must of used too much charcoal to start with because it went over 400 for a long time - I kept opening the lid to keep it from going over 400. Anyway ..I couldnt keep it at a steady temp until the coals burned way down. Is there a good way to measure out the starting amount of charcoal so I dont overdo it? Thanks!