[Molybdenum]

We've used lexan for the base of our electronics for years, and it's never broken. But I'd have to agree with the necessity of a shield. If you get some 1/8 inch lexan, you can make an arch over the entire setup, which should protect it from outside...uh...interference. Lexan is cool stuff -- it scratches, but never breaks, and once you shape it into something that isn't flat, it is pretty rigid.