Hmm. It's a very cool idea! Now, I don't think that's the Consequence, as what I see as the Consequence is a lot bigger -- if they fail to become what they must, the badguys will establish a firm foothold on Earth / they will lose Earth to the badguys.
But tying the Story Limit to the Goal may be something I'm missing. i.e. to be able to phrase it like "as they work to achieve (Goal), they are limited by (Limit)." It would seem like a stretch to phrase mine like that if the hidden starfighter is the true Limit. "In order to save Earth, they try to become what they must, limited by how long the starfighter can remain hidden." Yeah, it sort of works, but feels like a stretch.
Meanwhile, for Star Wars it does work. They are limited by the Empire running out space/options to search for the rebel base; you better hope that by the time that happens, they're ready to fight back.
Looking at it that way, maybe my Limit isn't so much that one hidden starfighter, but more to do with the badguys plan coming to fruition and the options they exhaust to figure it out and stop it? I may have to think about this more...