Good response Marty! If a person has the time and resources along with a build plan, it can be a lot of fun as well as rewarding. However I don't think it is possible for anybody to build one stove and it be less expensive than any mass produced stove. Here in the socialist state of Maine, it is against the law to build your own OWB and run it, it must be EPA certified, UL and CSA approved in order to be legally installed. The testing alone is typically $30,000 and up for each model tested, $250 per hour at the lab, pass or fail, we wonder why our businesses go outside of our country to manufacture, there it is folks in a nutshell. Whom do you think eventually pays for that red tape? It's only 6:30 AM and I'm already wound up !!!!! Best of luck to your buddy Scratch, let us all know if we can help in any way, look them all over before you start and take what ideas you like from each unit, draw up a plan and proceed, we would all like to see your progress.