Barry---We are going to have to find somebody to "proof" all the drawings I create, by building one of these after I get the drawings finished. I don't really care where they are in the world, but they are going to have to be experienced machinists, who are comfortable working in metric. This is not a project for "New-bees". Another very important factor in any drawings I make, is that the orthographic views will be in "Third angle projection" as is common practice in North America.---Not in "First angle projection" as is common to Europe. The sketches which you sent me are all in "First angle projection" and I had a difficult time reading them.----Brian