Thanks for the advice guys. I started with about 2/3 of a chimney of lit coals on top of a full ring of coals and she just ran away on me. I was also setup in direct sunlight and it was a hot day. I'll try again this weekend but i'll deff be starting far few coals in my chimney.
I was also considering picking up come high temp silicone and applying a thin bead around where the door seals as well as the lower ring to help seal up any air leaks. Any experience with this? Or don't bother?