I like the idea of voluntary prosthetics. But IME, your brain needs time to get used to these kinds of things and build them into its proprioception. For examp

I like the idea of voluntary prosthetics. But IME, your brain needs time to get used to these kinds of things and build them into its proprioception. For example, if you wear a vest containing haptic motors which constantly buzz towards North, your brain will start to build an understanding of directionality into your worldview, like how some migratory birds navigate. And when you take the vest off after wearing it for awhile, you'll feel oddly disoriented for some time. Try it out: motors and microcontrollers are cheap. This project looks sleek, but that strap between the thumb and index finger looks tight in the screenshot. Is it comfortable enough to wear for 18 hours a day? And if the thumb is controlled from your feet, what happens when the battery dies or the radio is disrupted? Brains do not like unresponsive limbs. Great concept, though - can't wait to see how it develops.