I am assisting a client who is using a 275 gallon home heating oil tank as an out door cooker. He's laid it on its side, and cut it horizontally. He wants to put hinges on one side and use what were the bosses for the feet to mount a handle. The problem is that the lid will be dangerously heavy. I've suggested that he use either a coil spring that adds torsion as the lid closes, or perhaps a coil spring wrapped around three pins, two mounted on the lower section, and fastened to the third pin on the lid. I haven't considered that sort of design since undergrad school, but I know that it can be done. (Incidentally, my personal preference is the torsion setup around a rod, in case it lets go). Anyone know how to approach this, and then specify and find the parts to make this happen?
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