I sense David may be caught-up in a "ritual" of sorts and if he has been doing this for 30 years, that could explain his consistant use of the term, "channeling". Perhaps he is unaware that there are many other terms/words which mean the same thing.
One would be hard-pressed to count/name the ways one can communicate with "The Spirit" with great success.
This is one of the main reasons I suggest we,,, and all those before us,,, are trying to say the same thing.
We are too often tricked by words because there aren't enough words to reach everybody.
"Knowledge exists independant of language"[CC]