Here's a link to a photo of a couple of Nick's instruments, in which you can see his bridge design pretty well. http://www.nikosapollonio.com/bouzoukis.html I hadn't thought about it before, but I think you're right that the result has to be some torsional force on the top. In any case, it's pretty interesting that both of these luthiers came up with what's basically the same concept, independently of each other as far as I know.
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