Hello everyone! I'm in high school and attempting to build a ruben's tube. I am on a very strict budget and came across free brass tubing, but the diameter is 1 inch. All the tutorials I've seen use a diameter of at least 2inches if not more. Will a pipe with a one inch diameter work? (at least in theory?) Or is there a real physical sciency reason that there must be a 2inch diameter. I appreciate all the help!