That's amazing! Any idea how they will separate the bottom of the piston? I wonder how they will balance it too, so that it doesn't seize in the cylinder. It

That's amazing! Any idea how they will separate the bottom of the piston? I wonder how they will balance it too, so that it doesn't seize in the cylinder. It seems like (re)moving material would be straightforward enough, but figuring out what the current balance is, maybe not so much.