Whelp, despite the skies threatening to rain again, I was able to find a way to test out my ray of death! (which is actually NOT an inappropriate name).

After a few minor flaws became apparent, and was fixed, (I didn't have the high voltage transformer or magnatron grounded O_o ), I was able to test the device out on a few things!

First, I tried some aluminum foil, which had very little effect. Then as I was shooting the foil, I realized that I was probably reflecting the radiation back towards myself! So I stopped that experiment...

I then got an AM radio, and used the antenna as a probe to detect where exactly the microwaves were traveling. To my displeasure, I found that even with the directing channel, microwaves were detected all around the device. Luckily, however, there was very little radiation directly behind the director (where I was sitting) and the waves were actually heavily concentrated directly in front of the director. That means the director IS working, but some of the waves can still penetrate through the metal. (keep this in mind when you are using your microwave ovens at home, because the director I am using is the same director from the original oven!)

Then for the final test, I got one of these florescent light bulbs, and shot it with the ray. And to my absolute delight, it lit up! @w@
I then placed the bulb directly to either side of the director, and powered up the ray again, and again, to my delight, the bulb did NOT light up!

I may have to take the leakage of microwaves into consideration when building the gun casing, but I think I can call this experiment an absolute success! ^^