I did a full chimney of unlit KBB with 3 smaller hickory chunks and a half chimney of lit. I waited till the smoked slightly started to lessen and assembled the smoker. When I saw very light streams of smoke coming from the top vent I added the chicken and added 1 medium hickory chunk. It did cook faster than I anticipated. The temp ran about 421 with all vents wide open. It was done in about an hour. It turned out great, great smoke level and very moist.