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maybe replacing the big coils with magnets because what you are creating with the battery is a magnetic field.
I think if you change the location of the bottom axis to the middle you will get better results!
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What about the MBR?It will for sure boot but programs like parted or gparted, it will end up with an error “…partition extends beyond end of device…”Instructions here: https://randomproj.wordpress.com/2015/10/28/how-to-modify-raspberry-img-partition-size-to-fit-new-sd-card/