Like someone above said I used my dremel tool with a couple of different diamond bit's. It took about an hour to cut the hole for the down stem and the carb hole. The down tube is actually a oil dipstick that I got from work. They are used on large diesel engines so they are made for high heat and the little metal nipple that is the bowl is steel and actually where the tube goes into the engine block. This is just the first I think next I will make one out of one of the cool looking liquer bottles. Peace