I am planning my uds build and have a quick question. How hot does the bottom of the drum get? I am planning to put approximately 3" legs on the bottom of the charcoal basket. I am going to have 2 wheels on it and 1 leg so I can wheel it in and out of the shed like a 2 wheel dollie. This will keep the bottom of the drum about 4" off the ground. Would you feel safe with this set-up on grass? Our yard gets pretty dry sometimes and I don't want to catch it on fire.