Drake's advice on other teachers is to learn from as many as you can and judge for yourself what works. Each teacher brings something different. (Office Hours Ep. 25, 50:42)
Chris Trump sits in the Natural Farming lineage in the Student's Manual, in the same list as Master Cho, Dr. Hoon Park, and Drake. (Student's Manual, Basic Course, p. 7) Dr. Park brought Drake and Chris together on a field trip to Chris's farm. Drake felt he had reached true ho'oponopono with him after years apart. (Office Hours Ep. 109, 38:56)
You asked for steady conversation and food for thought. Drake points people to these places:
The library does not say how Chris's course lines up with Drake's certification levels.
