I tried to make a rig for the Night-Night method, which I think is mostly mythical at this point. Utterly unviable for me. You're meant to trigger these barorecepters below the angle of your jaw, and pass out. You also need to crush the carotids, and you die from blood & oxygen deprivation. I could get the barorecepters, but the carotids are DEEP. At least mine are. I don't even want to think about what cutting them would involve. Full/short is harsh, but I think the cutting would be worse.
This is the shit we're forced to consider because most of us have no access to medical aid in dying. People will put their dog to sleep if its suffering becomes unbearable, but even very terminal humans are forced to settle for things like having feeding and fluids voluntarily withheld. They drug such patients way up to keep misery to a minimum, but this is still making Grandma die of thirst. We do this because human life is sacred. Cool.