I'm in the process of completely taking apart an old Japanese kenmore sewing machine, mostly aluminum frame with iron guts. Totally not worth it, and it's like solving a puzzle trying to get it completely apart, allot of parts pressed together. 11 MM bolt holding two parts of the frame together with 4 bolts, 7/16 works for that size though.
Why would uncrushed cans be worth more than flattened cans? I would thing that flattened cans would be worth more because they take up less space and don't need to be crushed.
They say un crushed as it keeps people from adding stuff to the cans, but I think they are trying to import them to California to try and get the deposit.