While searching the web I found a simple modification to reverse the motion of the leadscrew to be able to cut left-hand threads with my mini lathe. I liked the idea and go started. Here is the link: http://andysmachines.weebly.com/leadscrew-reverse.html You will also find many other interesting mods. Andy thanks for sharing! Also check http://www.uddeholm.gr and http://www.uddeholm.com to find more about steel properties. http://dmk-machine.gr Optimum Machines Greek distributor.