It's kind of an interesting tidbit. This is the first (that I can think of) event building that produces a specific type of unit rather than random ones. I'd bet that part of the discussion when designing this building was whether it would work with Traz. It probably doesn't because they would have to code it differently from all the other event buildings that produce units, and that would be more work than it was worth to them. I don't mind it, I wouldn't build the PY-R8 anyway.