Glenn, your raygun will be finished tomorrow night. I will temporarily install a GGW into it. I'm going to show it to some friends in Burlingame at the Norcal Head-fi (audio) show this Saturday. A guy that I know has an online name of Voltron. He is an attorney and is interested in the raygun design.
Millirad, I realize this is extremely late for your build but a friend of mine has his fathers toy Buck Rogers metal ray-gun made I believe circa 1940s for sale at his gunshop. Its' cheap tin toy construction but it looks just like the one in the archive pics of B.R. If this could be usefull to you PM me. Later, MR