Oh crap, I forgot I asked you that I was interested. Inform me when ever you're going to begin the III mission via forum PM.
Unfortunately, there's a bug with the level III missions that turns them into Raid II missions. Plus, the Void is really buggy. During one mission, I was suddenly no longer considered a valid actor, causing all the doors to remain closed, but only for me. In another run with some friends, one of them suddenly could not move with WASD, but could still move if he swung his Zorrens. Whenever he moved, he bounced up to the height where the glitch occurred then fell back down. Comical, yes, but the he couldn't activate the Extraction Event.
I'm thinking of just saving these until the Void becomes stable enough to trust.