I've been trying to get the extra perks (mainly rewind rounds) and I am stuck with the last quest step that's before you go to Ada for the perks. Ive done all of the levers and it just says to complete zero hour on legend. I've done probably a dozen runs of the mission and it just wont complete this step. is there a way around this so i can get the extra perks or am I screwed until bungie decides to fix zero hour and make it so the mission ends properly?