The bigger the distance, the higher the required voltage; perhaps quadratically related. You end up with huge custom made machines I can imagine resulting in high prices.
Or maybe it’s the shipping cost that is so high due to the included batteries and new regulations…
Seriously what? With respect this seems extremely unlikely (not saying they’re lying). I mean mass remains identical so density must go up right? How is that possible metallurgically. Gonna check it out later; I gotta go now.
Edit: checked out already. It only shrinks diameter, and thickness increases. Coins are “just” plastically deformed.
I’ve been looking through that acrylic website some more, and it seems they’ve found a way to control it more than just letting the electricity do its thing. I’m assuming its more targeted magnetism, but the results are pretty awesome. They even do acrylic guitar bodies.