Binary Star Games, i hope you can do a bit of clarification on the rulebook about Backup Armaments.
I think it will be more clearer if you guys mention that each Frame do have at least two Backup Armaments that they can switch into and cannot switch back until mission end, in the sub chapter of Armaments.
Then reminds the players again about this rule during the Attack explanations.
Thank you very much, Binary Star Games! Cool game you got here, folks!