Hi Bob, Take a look at the BK1 website below. When the front page of the website comes up, click on the BK1.0 builders log which is 180 photos of the building process. Photos 76 thru 79 show photos of his metal fuel tank that he built. There are captions at the bottom of the photos. He built his tank with pieces of metal (probably aluminum) that he bent up to fit his plane, riveted together and used pro seal to seal all the joints.
http://bkfliers.com/ Larry H.
