Yeah I'm with Charlie, certainly not disappointed. I think the idea of increasing efficiency by using less energy is always cool, especially on something of this scale. That things is really cool, quite a few of my friends are heavy equipment operators and I have always found these (okay, never anything as big as this one) machines to be very interesting. Then with the idea of being able to store energy without having batteries seems perfect for an application like this, especially with such a long life of the machine.
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