Birth of the Blue Missile

In case anyone needs a great visual aid on creating vacuum from compressed air, I now have one. I am using these for the afterburner system, lets leave off the youre crazy comments here. This fixture uses pure physics to take 90psi are and create 28" of vacuum. You guys that want to try vacuum bagging on a part can use one of these. HF @ $20.
I drilled some mounting holes in the first one and hit a cavity. I did not know If I had hit one of the air passages, so I cut the piece in half, confirming my layout was correct and I had hit a bubble in the casting.
Here are the pics.
Andrew