First some pleasure...........you deserve a lot of credit or kudos for producing a superb and beautiful piece of machinery! Ditto your charitable efforts. Now--to the business at hand. 40 gallons...in water..is 320 lbs. Gasoline can't be that much different. So-o-o-o do you have smaller tanks and maybe evern a catalog? I'd like to see your line of parts and techno bits, if possible. If you have such, let me know.
Thanks.