I tried to email you but when I copied it into the email program it showed javascript:jgd_email(‘jgd’). I saw an ad from Harbor Freight Tools for a portable torch kit with oxygen and acethylene tanks – empty and thought it would be good to learn to weld with. And then I was trying to learn how I could get the cylinders filled and that is how I came upon your post http://yarchive.net/car/rv/acetylene.html It was very helpful in my efforts at learning how the acethylene tank is filled. I read your explosion experiment and am now unsure about how I would get the tank filled with owning the tank myself and then storing it here in my garage. I’ve decided to learn more, much more before making the final purchase at Harbor Freight. I also appreciated reading your site. Thank you. Patricia