DeLeon: (to Marsh) You got to keep your eye on his right, and then duck.
Marsh: Ahhh, if he could do that in an e-frame he'd be dangerous.
Simbacca: If someone did that to me he would not live to see another day.
Marsh: (to DeLeon) Uhhh, remind me never to punch that guy.
(As Marsh leaves a training session with the aspiring e-frame pilots (whose progress is not good), Alec arrives to tell him of ExoFleet's suspicions of a spy)DeLeon: J.T., I think we have a problem.
Marsh: Only one? I've got six of 'em in there.
That the ExoFleet did not notice a Neo base being built on another of Jupiter's moons is plausible. The closest Io and Sinope ever get is over 23,000,000 km apart (over sixty times the distance between the Earth and Moon). No wonder Simbacca was shocked by the weapon's range.