Groovy 1970 TV show about surfboard manufacture, with Woody Allen and Jonathan Winters

This 1970 episode of the kids' show HOT DOG demonstrates surfboard manufacture with much groovy graphics and sound, cosmic ruminations on hanging ten, and hilarious cameos from Woody Allen and Jonathan Winters. Gorfulator notes, "This was made by 'HOT DOG,' a TV show I remember because the production company HQ was in my hometown of Burlingame, CA. They were a spinoff venture of Lee Mendelson (Charlie Brown cartoons) who were right around the corner."

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(Thanks, Gorfulator!)