Aaron and Rae came to visit on Sunday! They are on a roadtrip doing a documentary on intentional communities, and they drove their woodgas truck (although on gasoline).
Apparently they got the truck all built and ready to fire up, but got stuck on the operation of it, and because the gauges they had bought read in inches of mercury instead of water, they thought there must be a huge vacuum leak somewhere.
We spent about an hour looking over the truck, fixed a loose connection, and fired it up on woodgas. Truck ran and drove just fine! It needs an idle string and some new vacuum gauges.
Best of luck on the rest of your trip guys!