Since my earlier post, I've discovered the wonder, joy, and elegance that IS the [link=http://home.mindspring.com/~the-plumber/Vanessa%20CG%20Machine.htm]Vanessa CG Machine[/link]. Works for ANYTHING you are to name...low wing, high wing, bipes. Little planes or big ones (I balanced my 33% Pitts S2S Bulldog on one). Won't cost ya more than $20 to make, and that's if you have NONE of the material laying around.