I always have to prop my door open on the WSM to get the heat much over 310...I use a small S hook, hang on bottom of door opening, put door in upside down. It stays real nice and works great to give additional air flow to bring temps up higher.
CHicken looks good!
WSM, Weber Genesis Silver-B
Weber Q Portable
1956 Weber 22 1/2" Bar-B-Que Kettle
and a Super Fast R E D Thermopen!!!