Okay, I don't usually like videos to learn from compared to written material but that video is very very good. And the booklet is great (as a recovering computer scientist, I <3 decision trees). After reading it I went and found similar EBLEX booklets for worm control and fluke control and have saved those too.
It would have been extremely helpful if someone had pointed me to these on Friday when I first asked questions, as it's exactly the kind of information I needed. But appreciated now as well.