"Be Thou My Vision"..with no clapping rule strictly enforced

Thanks to Shallow Frozen Water for the tip on this video of Roby Duke's version of "Be Thou My Vision." You can't help but notice his comments at the beginning and end about his "no clapping" rule.
 To see/hear Any Rodgers doing two versions of this song--ethnocelt version in a bar, and church vesion with no one less than Chester Thompson--see this.  Chester also plays on the Brownsville version here
(Did I ever tell you I ran into Chester--literally--in the men's room at the Brownsville church?)

Iona version here.