I got my DVDs recently. And yesterday I got an email from someone setting up a project in Senegal, asking me for whatever useful information I might have (a mutual friend suggested that I could have such information). Rocket mass heaters aren't relevant, but an efficient cooking stove probably is. The Kickstarter is over. Will there be other opportunities to buy the DVDs? If not, would it be possible for me to get permission to make copies, for a suitable fee to the authors? Might it even make sense to set up a PayPal button just for that, if there are other people who want to spread the information, but who want to make sure the authors are rewarded for their work?