Firstly there was a lot of cutting of the metal sheets to get the right shapes This was then followed by replanning the fuel tank and the execution (how many sections to it, how would they fit etc.) and then redesigning it. After the redesigning came a lot of hitting and English wheeling. I found that the side parts of the fuel tank were the hardest as every time you'd slightly it them they would completely warp and change shape. And once one of them changed shape they would be asymmetrical. I found this really frustrating and infuriating but after a walk or two to cool off and many (many, many) attempts they finally took a similar shape. Then in-between all the hitting was the checking against the laser cut model to make sure the metal was taking the shape and form wanted. Which, through much hitting, wheeling and shrinking started to finally look something like a final product
