[jgoodknight]

This is fascinating; I love hear pumps! Can you comment on why this might not have been done before? Maybe new materials make it possible, or it’s marginally more expensive but can be done with clean energy, which people have a premium on now?

[franckl]

Good question! I would say advances in numerical simulations, cheap renewable energy, and a lot of luck/perseverance (we would not have found this technology without spending 3 years on the first idea that didn't work out)