That was a good show. I think they had 2 of them in different places, but it just sort of stopped.
One of them made a wood gasifier to run their gennie. Not having ever seen that before (or knowing much about the history of such things) that was mighty impressive to me.
The US Government had a booklet on how to do that. You can still get it (for free) from Google Books.
One should be careful making one of those critters. I made a mistake and had one go volcanic on me and drop hot charcoal down my collar.
I still have the scars on my back.
In theory, theory and practice are the same. In practice, they aren't.
I always try new stuff to see what the hidden pitfalls are. ;)
/johnny