I was thinking Darth Vader too ..
I was sort of thinking of doing a frag tank like this actually, it's neat to see someone else had the same idea. A whole false wall basically to the tank instead of a wavebox? You could use multiple 6100's on a singlecontroller or a 6200 on a singlecontroller and basically have the wavebox effect for .. well, I guess it's not a "fraction" of the price (well I guess it is, it's just that the fraction is probably more like 4/5 instead of say 1/5), but basically a fraction of the price. And you don't get this wicked ugly black box in the tank that sticks out like a sore thumb. (Don't get me wrong, I love waveboxes and the effect they produce ... but they are an eyesore no matter how you slice it!)