In the last 2 weeks two very good videos have been posted, including their documentation. We recommend you take a listen / watch.
Water for coffee – by TamperTantrum
Link to podcast: TamperTantrum.com/water-for-coffee-extraction/
Reco Symposium – Hanna Neuschwander | The Coffee Seed: A Forgotten Technology
You Tube channel: http://Youtube.com/user/SCAASymposium
Hanna Neuschwander of World Coffee Research gives an illuminating talk on our most fundamental of coffee technologies: the plant itself. She calls attention to the disparities in innovation between the coffee plant and other technologies, and the critical need for more research and development.