To all of you who have criticisms that The Resistance have magically got the plans to Starkiller Base, they aren’t the technical details like with the Death Star. I’ve watched that scene about 5 times now, its only a surface scan that a recon ship was aparently able to do, undetected and in the short timeframe since it blew up Hosnian Prime.

So its not unlikely that they’d have the data, but we do have a contradiction when Finn points at the thermal oscillator and somehow the hologram shows that its piped to the planet core, which would not have happened if it was just a surface scan.

JEDIT: Watching further into the scene, how is it possible that they know Illenuim is next, or that TFO is charging the weapon again, they didnt know how it was charged in the first place, until Finn said.

Maybe they could tell its pipe was pointing right at them ready to shoot 😉