Thank you very much, The drip/water pan is removable 10 ga. the best I can remember . The smoker has an inner skin and a middle skin, that is how the smoke travels up and a gap at the top where the smoke and heat comes out and back down and exits through the holes you see in the rear, that is the smoke stack. Between the middle and outer skin we used bat insulation also in the doors as well. you can lay your hand on it and it will not burn you, barley gets warm. As far as its cooking we only cooked on it twice, worked like it was supposed to, uses very little fuel. As we were building it a friend of our a local contractor liked it and wanted one. So we told him to take it, and try it out to make sure if that is what he wanted and it would work for him. That was about 9 months ago, said he loves it and uses it almost every weekend. (Did some trade out and barter system) everyone's happy.