What exactly is being tested by this prototype? Is this intended as a test of the claim that belts cannot be used with derailleurs (since the belt won't work and/or won't last when loaded in skewed position)? Or is this intended as a test for some unusual new belt technology, which will supposedly withstand such abuse?

In other words, did you do it just for the heck of it (i.e. "damn the torpedoes")? Or did you take some non-obvious measures to alleviate the known problems?