Thanks for all the help guys, he ran into a problem with the counterweight, it was a problem I had to describe for him and let his mind try to figure it out. He came up with some simple solutions that of course do not work nut his mind is in the move.
I love his can do attitude
He drew a template on the plinth of my SP 25 and had drill in hand when I had to stop him!
I like the heavy base idea instead sort of like the RS labs arm.
We are off to vacation today so it may be on the back burner for a while!
mike