I saw the GPS-based doggy locator system post. Has anyone done this one? Use one or three (triangulation) in-home reciever/transmitters (maybe paintable, to blend into corners of ceiling) to track and record the exact location of your cat(s), while in the house (or any location in the range)? It seems like it wouldn't necessarily need a really high-power or sophisticated transmitter/receiver. . . I would've used this when we trained our second cat to use the toilet. She would occasionally...