Dan Boone wrote:If this unit has solved the hard problem (getting a machine to distinguish and successfully handle the ripe berry) there will soon be other units that do it better, faster, cheaper, and under more complicated circumstances. Including -- this would be the permaculture dream -- in a polyculture. Imagine a solar-powered quadcopter that docks on your porch. It's no bigger than your hand. It tirelessly roams out into your garden. During raspberry season, it brings back one perfect raspberry at a time, depositing them in a little solid-state chiller in its docking station to await your collection at your convenience. When it runs low on battery it sits on the charging station. When it runs low on perfect berries, it senses ones with bugs or worms and snips them, taking them straight to your hot compost pile or your chicken run or other designated destination. .