Note: Diamond-studded, solid gold fence posts are not expensive because of the diamonds. They are expensive because multi-field projection systems are persnickity things to tune, even if the diamond optics have been machined to perfection. After all, you want to keep the cats out of your sandbox, but you don't want to kill them. And if you DO kill them, you don't want it to look like your very shiny fence was the culprit.