Yeah, there's... problems getting it to work. In the HBS game it's relatively easy to just mess around with the stats for the engine, structure, and such. Once you get to the tabletop, it's another story entirely. I know from the forums there had been people who managed to do it, but not easily.
From what I recall, it required a mixed tech base and had an issue with crit slots. Then there was the problem of its origins being both explicit and unknown at the same time. In the end, it's really just a massive issue to try to squeeze into canon as existing. And a headache of licensing issues.