David Gingery wrote a series of books called 'Build Your Own Metal Working Shop From Scrap' - the 1st one is 'The Charcoal Foundry" and the 2nd one describes this lathe. The idea is that you could build a charcoal fired furnace with a 1 quart iron crucible and build the lathe with aluminum castings using hand tools and then use the lathe to build other machines. I built an 240V electric furnace using a clothes dryer heating element and started casting aluminum on the patio of the apartment I was living in. (I made a sand box to pour over, to avoid safety problems with molten metal and cement) I originally chose the electric furnace to avoid unwanted attention at the apartments, but the bonus is that I can replace the element and get bronze melting temperature. Anyway I deviated from the plans a bit, and cheated by using the machine shop at school to clean up castings. I got to the point where I had all but maybe 3 castings to go and then graduated, got a job, had kids, etc. The project got put on hold. It would be cheaper to buy a mini-lathe than to build this, but I used scrap aluminum and spread the costs out. Of course the experience of learning how to cast metal is priceless. I think the biggest single cash outlay was the $50 +shipping I spent on a 3"x"1/2"x36" piece of ground steel I got from Enco, which I thought was outrageously high at the time! The plans called for a 4-step pulley drive system and a 1/4hp motor, but now-days the right sized pulleys are so expensive I decided to buy a working treadmill with a variable speed motor (people often give these away, but I had to spend $20) last Fall. With all the Aluminum parts, it won't be the most rigid tool in the world, so I'll have to take lighter cuts. Of course, the first thing I'll want to make when I get it working is a cannon barrel!