Simplified explanation on how Voigt pipes work relevant to choosing the right type to build.
Here, I share the most relevant info for Voigt cabinet type choices. This video is a quick and dirty crash course.
There is much more to it, but hey 20min!! Who are you kidding?! An in depth explanation would take MANY, MANY hours, days. Here, is only what is salient to making choices.

Kaplah ;