Why? He’s just hacked on an external cooling system that is in no way meeting the basic quality requirements of a production device. For that you’d want to hire a heat transfer engineer with experience of designing small-sized passive solutions, and with both a valid work visa for Japan and fluency in Japanese.
Kudos to the guy for debugging his particular problem, but that doesn’t make a product.
Kudos to the guy for debugging his particular problem, but that doesn’t make a product.