I have my new firebox almost built. It's 24" X 24" X 24", has an ash drawer, and made with 1/4 inch plate. Since I'm in a fabricating mood, I was thinking about adding a sink with hot water to the mix. So here is my questions. 1) Would you bolt or weld the firebox to the cook chamber? My old one is welded and I'll have to cut it off and repair what ever I inadvertently cut out. 2) I was thinking about adding copper coils to the inside of the firebox to heat water. Since the melting point of copper is almost 2000 degrees, I thought that it would be safe. I will probably fabricate a water tank that will fit in nicely with the arrangement that I have. What do you think? I have a place for a generator to run th water pump and a small fridge.