Small hint I really only use one side for the coals and adjust distance, the grill eventually burns off the nice stainless coating and rusts, I've kept that side over the heat always then the cooking side stays non stick and I can just spin it round for burgers over the heat.
Depends how long that takes, if it is like every year or two then I'll just replace it with a new grill....I don't think I want rust near my food.