Great project. Great photos of the process. Where did the design come from. Is it one of your own, a copied model, or something you learned in an inservice workshop? These pilas will have long lasting benefits for the families involved. Any time you can remove some of drudgery from everyday tasks such as washing clothes and dishes, you free up time for other things that might further improve the health and well being of a family. Every little bit counts when you are living a subsistence lifestyle.