Decided to give woodgas a try with a lawn mower. Have a welder bought on ebay for $130.00 on the way and was just looking at plasma cutters... OUCH! the "good" ones that have the pilot arc are a bit pricey => Good thing I dont need to cut rusty iron. That said my first experiments are probably going to be limited to paint and soup cans.
I have seen many designs and some that seem to work great but they dont give details about the insides.