Hey everyone! I need some serious help. I've been wanting a smoker for a long time. Finally picked up an electric brinkman model yesterday and cured it. I found a recipe that I liked - a 3 lb chuck roast with a rub - and cooked it today at the exact specifications - I cooked it with the provided wood (came with the smoker) for 3 hours on the rack and wrapped it in foil and cooked it for another 2 hours. I anxiously put 2 forks in it to pull it apart only to find it tough. It is barely edible. What did I do wrong? Thanks!