Excellent resource, WD.! Have browsed Appropedia before, and found it to contain a wealth of information, with helpful guidance on how to craft different projects. I quite like the stealth lawnmower. Solar Charged Lawnmower - Appropedia: The sustainability wiki add a camera, remote surveillance and remote control system, self powered locomotion...arm it with an auto shotgun....and it will do for just about any varmints getting into your garden or crops.