I'm glad you are building a steam powered car Wafflemaster. What troubles me is your blatant disregard for the patient,informed warnings of people who know what they are talking about.Your disregard doesn't stop at their warnings....it continues at the disregard for not only your safety but that of any bystanders. How are you going to feel ,if you survive,when that bomb DOES go off and you're lying in the hospital in a room next to some of your friends and/or neighbors who are also wondering what happened? Do you have enough insurance to pay for all the ambulance,hospital bills,funeral expenses,and property damage that thing is going to cause? Even the person holding your beer when you say "watch this" aint going to be far enough away.You seem to be an intelligent sort of fellow.So ,why don't you take the hint? GET RID OF THAT BOILER!