Stacked MMG

If the 2+2+2 multichannel configuration is good and more DVD-A discs produced this way become available, we folk who have Magneplanar speakers are in trouble. The 2+2+2 system calls for two speakers on each side in the front: one mounted low, the other mounted high. That's hard to do with Magneplanar speakers which already stand about 6 feet tall.

It occurs to me that the Magneplanar sound characteristics might be retained while providing the High/Low speaker array by using a stacked pair of MGG models on each side. (Of course the top one should be upside-down so that the tweeters line up). This would result in an 8-foot array, which fits under the ceiling, with slightly more diaphram area than a MG 1.6. They could be driven either with the same signal for 2-channel or 5.1-channel use, or with the different high and low signals for 2+2+2.

Has anyone tried stacking MMGs?
This question was just asked at MUG over at the audio asylum, it was just a few days ago. I could be wrong but I don't think anyone had tried it yet(I didn't follow the thread closely), for the cost of MMG's buy them used and give it a shot, if it doesn't work they will sell quickly. If nothing else it seems like an interesting idea :)
I called Magnepan. The woman I spoke with may not have understood what I was asking about, or why it was of interest, but the idea of stacking MMGs is not on their list of good ideas. They would rather sell their larger models. (But I may do it anyway).