Ok, so I can confirm that the "back door" entrance to Agrippa shield building works. I was 150/max HU when I started and it let me go through stages 1-3 in entirety. I am now looking to do the Agrippa device missions "through the back door" as well. I have purchased another gold token but neither Kenlz or Grrr.. will offer any talk to me. I believe I originally spoke to another NPC to get the shields back door rolling (some sort of a bribe or favour i'm sure!) but I cant remember who, and it's p