I wish I had your more in-depth knowlege of our rich fan-tech heritage. I've saved a lot of stuff from Cygnus, and it's great, but back when I was at the perfect age to devour and absorb it, I only had FJ and Michael McMaster. I would think the studio drew lines in the sand for several reasons. - Fan-sourced tech was created by various unconnected authors and sometimes contradictory. - Some fan work was rough around the edges, lets say. - If a studio production acknowledges fan-sourced tech, the artist might be just flattered, or who knows, he might want royalties. And that's a hassle. - Abiding by fan tech would limit what new scripts could do, whereas new, official tech could be tailored to suit the story needs of whatever new movie or episode was in production. - Making up new tech might actually have been cheaper than the continuity research and legal clearances needed to use what fans had created. It was some combination of those things. Anyway, it's back to head canon, because they can't force you to give up what you love or adopt what you don't.