ArtMetal

Rich I realize there are so many variables, and combinations of them that make the issue rather interesting, and worthwhile trying one own`s contraption to see how it works. I do have a nice fan, but having read some of the drawbacks, seems appropiate to try the venturi type, again this is a matter of personal preference. All that said, I will start my experiment out, based on those basic principles you mentioned as well as a bunch more not to overlook. I`ll post the ongoing task and hope that when I light it up, the last step will be worth showing too.
Rich, thanks you for your highly tech input. Nelson.