Closed top, used for engine oil - but they just don't use metal drums for food over here as far as I can work out. Now all the other bits I've identified on the internet need ordered and the build will begin. First UDS in Scotland? Don't know - but I can't wait to get is working. I've found out that a guy in the local pub butchers for a rare breed organic beef farm - briskets and beef ribs are NOT on their selling list - so I can get them at the wholesale sell of to the burger manufacturers price I've put a lot of thought in - now it's time for some action - thanks all for the inspiration.